Add a way to dismiss PopupMenu elements

Summary:
In native Android apps, like the YouTube app, context menus are closed when the device orientation changes.

In React Native apps instead, when having a [PopupMenu](https://developer.android.com/reference/android/widget/PopupMenu.html) open and rotating the device, the PopupMenu is not dismissed and appears in a wrong position on the screen.

This PR exposes a `dismissPopupMenu` method to allow the application to dismiss any open PopupMenu:

```(javascript)
UIManager.dismissPopupMenu()
```
Closes https://github.com/facebook/react-native/pull/15636

Differential Revision: D6837663

Pulled By: hramos

fbshipit-source-id: 7b0f4f04341129ad45c703a50897e17d93651974

ReactAndroid/src/main/java/com/facebook/react/uimanager/NativeViewHierarchyManager.java

@@ -74,6 +74,7 @@ public class NativeViewHierarchyManager {
   private final LayoutAnimationController mLayoutAnimator = new LayoutAnimationController();
 
   private boolean mLayoutAnimationEnabled;
+  private PopupMenu mPopupMenu;
 
   public NativeViewHierarchyManager(ViewManagerRegistry viewManagers) {
     this(viewManagers, new RootViewManager());
@@ -731,18 +732,27 @@ public class NativeViewHierarchyManager {
       error.invoke("Can't display popup. Could not find view with tag " + reactTag);
       return;
     }
-    PopupMenu popupMenu = new PopupMenu(getReactContextForView(reactTag), anchor);
+    mPopupMenu = new PopupMenu(getReactContextForView(reactTag), anchor);
 
-    Menu menu = popupMenu.getMenu();
+    Menu menu = mPopupMenu.getMenu();
     for (int i = 0; i < items.size(); i++) {
       menu.add(Menu.NONE, Menu.NONE, i, items.getString(i));
     }
 
     PopupMenuCallbackHandler handler = new PopupMenuCallbackHandler(success);
-    popupMenu.setOnMenuItemClickListener(handler);
-    popupMenu.setOnDismissListener(handler);
+    mPopupMenu.setOnMenuItemClickListener(handler);
+    mPopupMenu.setOnDismissListener(handler);
 
-    popupMenu.show();
+    mPopupMenu.show();
+  }
+
+  /**
+   * Dismiss the last opened PopupMenu {@link PopupMenu}.
+   */
+  public void dismissPopupMenu() {
+    if (mPopupMenu != null) {
+      mPopupMenu.dismiss();
+    }
   }
 
   private static class PopupMenuCallbackHandler implements PopupMenu.OnMenuItemClickListener,

ReactAndroid/src/main/java/com/facebook/react/uimanager/UIImplementation.java

@@ -802,6 +802,10 @@ public class UIImplementation {
     mOperationsQueue.enqueueShowPopupMenu(reactTag, items, error, success);
   }
 
+  public void dismissPopupMenu() {
+    mOperationsQueue.enqueueDismissPopupMenu();
+  }
+
   public void sendAccessibilityEvent(int tag, int eventType) {
     mOperationsQueue.enqueueSendAccessibilityEvent(tag, eventType);
   }

ReactAndroid/src/main/java/com/facebook/react/uimanager/UIManagerModule.java

@@ -600,6 +600,11 @@ public class UIManagerModule extends ReactContextBaseJavaModule implements
     mUIImplementation.showPopupMenu(reactTag, items, error, success);
   }
 
+  @ReactMethod
+  public void dismissPopupMenu() {
+    mUIImplementation.dismissPopupMenu();
+  }
+
   /**
    * LayoutAnimation API on Android is currently experimental. Therefore, it needs to be enabled
    * explicitly in order to avoid regression in existing application written for iOS using this API.

ReactAndroid/src/main/java/com/facebook/react/uimanager/UIViewOperationQueue.java

@@ -285,6 +285,13 @@ public class UIViewOperationQueue {
     }
   }
 
+  private final class DismissPopupMenuOperation implements UIOperation {
+    @Override
+    public void execute() {
+      mNativeViewHierarchyManager.dismissPopupMenu();
+    }
+  }
+
   /**
    * A spec for animation operations (add/remove)
    */
@@ -656,6 +663,10 @@ public class UIViewOperationQueue {
     mOperations.add(new ShowPopupMenuOperation(reactTag, items, error, success));
   }
 
+  public void enqueueDismissPopupMenu() {
+    mOperations.add(new DismissPopupMenuOperation());
+  }
+
   public void enqueueCreateView(
       ThemedReactContext themedContext,
       int viewReactTag,