Add "import Foundation" to any class that is using @objc

Summary:
This is to prevent the following error that was seen in D33750740 (8044535803)
```
objc attribute used without importing module 'Foundation'
```

Found the files with:
```
git ls-files '*.swift' | xargs ack -l 'objc' | xargs ack -L 'import (Foundation|XCTest)'
```

Note: In D33783526 (4610b07bda) a custom SwiftLint rule was added to detect this but it only works if there aren't any other imports.

Reviewed By: samodom

Differential Revision: D33803396

fbshipit-source-id: 575d7798a77aac30384f8f44c1d45f97d60fe8f7

FBAEMKit/FBAEMKitTests/Helpers/TestInvocation.swift

@@ -7,6 +7,7 @@
  */
 
 import FBAEMKit
+import Foundation
 
 @objcMembers
 class TestInvocation: AEMInvocation {

FBSDKCoreKit/FBSDKCoreKitTests/Internal/Helpers/TestAEMReporter.swift

@@ -6,6 +6,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+import Foundation
 import UIKit
 
 // swiftformat:disable indent

FBSDKCoreKit/FBSDKCoreKitTests/Internal/Helpers/TestAdvertiserIDProvider.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 class TestAdvertiserIDProvider: NSObject, AdvertiserIDProviding {

FBSDKCoreKit/FBSDKCoreKitTests/Internal/Helpers/TestAppEvents.swift

@@ -6,6 +6,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+import Foundation
 import UIKit
 
 // swiftformat:disable indent

FBSDKCoreKit/FBSDKCoreKitTests/Internal/Helpers/TestClientTokenProvider.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 class TestClientTokenProvider: NSObject, ClientTokenProviding {

FBSDKCoreKit/FBSDKCoreKitTests/Internal/Helpers/TestErrorConfiguration.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 class TestErrorConfiguration: NSObject, ErrorConfigurationProtocol {

FBSDKCoreKit/FBSDKCoreKitTests/Internal/Helpers/TestEventLogger.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 class TestEventLogger: NSObject, EventLogging {

FBSDKCoreKit/FBSDKCoreKitTests/Internal/Helpers/TestGraphRequestPiggybackManager.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 final class TestGraphRequestPiggybackManager: NSObject, GraphRequestPiggybackManaging {

FBSDKCoreKit/FBSDKCoreKitTests/Internal/Helpers/TestPasteboard.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 class TestPasteboard: NSObject, Pasteboard {

FBSDKCoreKit/FBSDKCoreKitTests/Internal/Helpers/TestReactNativeView.swift

@@ -6,6 +6,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+import Foundation
 import UIKit
 
 class TestReactNativeView: UIView {

FBSDKCoreKit/FBSDKCoreKitTests/Internal/Helpers/TestServerConfiguration.swift

@@ -6,6 +6,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+import Foundation
+
 // Hacky subclassing to get around init not being available.
 // Future work should update ServerConfigurationProvider to return
 // a true abstraction instead of a concrete ServerConfiguration and this

FBSDKCoreKit/FBSDKCoreKitTests/Internal/Helpers/TestServerConfigurationProvider.swift

@@ -6,6 +6,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+import Foundation
 import TestTools
 
 @objcMembers

FBSDKCoreKit/FBSDKCoreKitTests/Internal/Helpers/TestSwizzler.swift

@@ -6,6 +6,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+import Foundation
+
 struct SwizzleEvidence: Equatable {
   let selector: Selector
   let `class`: AnyClass

FBSDKCoreKit/FBSDKCoreKitTests/Internal/Helpers/TestTokenCache.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 class TestTokenCache: NSObject, TokenCaching {

FBSDKCoreKit/FBSDKCoreKitTests/Internal/Helpers/TestViewControllerTransitionCoordinator.swift

@@ -6,6 +6,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+import Foundation
 import UIKit
 
 @objcMembers

FBSDKCoreKit/FBSDKCoreKitTests/Internal/Helpers/ViewControllerSpy.swift

@@ -6,6 +6,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+import Foundation
 import UIKit
 
 @objcMembers

FBSDKGamingServicesKit/FacebookGamingServices/FriendFinderDialog.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objc(FBSDKFriendFinderDialog)
 public class FriendFinderDialog: NSObject {

FBSDKGamingServicesKit/FacebookGamingServices/GamingGroupIntegration.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 @objc(FBSDKGamingGroupIntegration)

FBSDKGamingServicesKit/FacebookGamingServices/GamingImageUploader.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 @objc(FBSDKGamingImageUploader)

FBSDKGamingServicesKit/FacebookGamingServices/GamingImageUploaderConfiguration.swift

@@ -6,6 +6,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+import Foundation
 import UIKit
 
 @objcMembers

FBSDKGamingServicesKit/FacebookGamingServices/GamingPayload.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 @objc(FBSDKGamingPayload)

FBSDKGamingServicesKit/FacebookGamingServices/GamingVideoUploader.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 @objc(FBSDKGamingVideoUploader)

FBSDKGamingServicesKit/FacebookGamingServices/SwitchContextContent.swift

@@ -9,6 +9,7 @@
 #if !os(tvOS)
 
 import FBSDKCoreKit
+import Foundation
 
 /**
  A model for an instant games switchAsync cross play request.

FBSDKLoginKit/FBSDKLoginKitTests/TestAppEvents.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 class TestAppEvents: AppEvents {

FBSDKLoginKit/FBSDKLoginKitTests/TestLoggerFactory.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 class TestLoggerFactory: NSObject, LoggerCreating {

FBSDKLoginKit/FBSDKLoginKitTests/TestLoginCompleter.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKLoginKit
+import Foundation
 
 @objcMembers
 class TestLoginCompleter: NSObject, LoginCompleting {

FBSDKLoginKit/FBSDKLoginKitTests/TestLoginCompleterFactory.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKLoginKit
+import Foundation
 
 @objcMembers
 class TestLoginCompleterFactory: NSObject, LoginCompleterFactoryProtocol {

FBSDKShareKit/FBSDKShareKit/FBSendButton.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 #if !os(tvOS)
 

FBSDKShareKit/FBSDKShareKit/FBShareButton.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 #if !os(tvOS)
 

FBSDKShareKit/FBSDKShareKitTests/TestBridgeAPIRequestFactory.swift

@@ -6,6 +6,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+import Foundation
 import TestTools
 
 @objcMembers

FBSDKShareKit/FBSDKShareKitTests/TestSocialComposeViewControllerFactory.swift

@@ -6,6 +6,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+import Foundation
 import UIKit
 
 @objcMembers

Sources/FBSDKGamingServicesKit/FBSDKContextDialogPresenter.swift

@@ -8,6 +8,7 @@
 
 import FacebookGamingServices
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 open class FBSDKContextDialogPresenter: NSObject {

Sources/FBSDKGamingServicesKit/FBSDKSwitchContextDialog.swift

@@ -8,6 +8,7 @@
 
 import FacebookGamingServices
 import FBSDKCoreKit
+import Foundation
 
 /**
  A dialog to switch the current context through a web view

TestTools/TestTools/SampleUserProfiles.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 public class SampleUserProfiles: NSObject {

TestTools/TestTools/TestAccessTokenWallet.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 public class TestAccessTokenWallet: NSObject, AccessTokenProviding, AccessTokenSetting, TokenStringProviding {

TestTools/TestTools/TestAuthenticationTokenWallet.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 public class TestAuthenticationTokenWallet: NSObject, AuthenticationTokenProviding, AuthenticationTokenSetting {

TestTools/TestTools/TestGraphRequest.swift

@@ -7,6 +7,7 @@
  */
 
 @testable import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 public class TestGraphRequest: NSObject, GraphRequestProtocol {

TestTools/TestTools/TestGraphRequestConnection.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 public class TestGraphRequestConnection: NSObject, GraphRequestConnecting {

TestTools/TestTools/TestGraphRequestConnectionFactory.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 public class TestGraphRequestConnectionFactory: NSObject, GraphRequestConnectionFactoryProtocol {

TestTools/TestTools/TestGraphRequestFactory.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 public class TestGraphRequestFactory: NSObject, GraphRequestFactoryProtocol {

TestTools/TestTools/TestInternalUtility.swift

@@ -8,6 +8,7 @@
 
 import FBSDKCoreKit
 import FBSDKCoreKit_Basics
+import Foundation
 
 @objcMembers
 public class TestInternalUtility: NSObject,

TestTools/TestTools/TestKeychainStore.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 public class TestKeychainStore: NSObject, KeychainStoreProtocol {

TestTools/TestTools/TestKeychainStoreFactory.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 public class TestKeychainStoreFactory: NSObject, KeychainStoreProviding {

TestTools/TestTools/TestURLOpener.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 public class TestURLOpener: NSObject, URLOpener {

TestTools/TestTools/TestWindowFinder.swift

@@ -7,6 +7,7 @@
  */
 
 import FBSDKCoreKit
+import Foundation
 
 @objcMembers
 public class TestWindowFinder: NSObject, WindowFinding {