Add Activity to onActivityResult listener interface

Summary:
The Android lifecycle is weird: turns out `onActivityResult` is called before `onResume`. This means `getCurrentActivity()` could return the wrong instance, or `null` if the activity was destroyed. To give developers access to the Activity receiving the result (which is also about to become the current activity), pass it as an argumento the listener.

Fixes github issue #8694.

Reviewed By: donyu

Differential Revision: D3704141

fbshipit-source-id: e7e00ccc28114f97415e5beab8c9b10cb1e530be

ReactAndroid/src/main/java/com/facebook/react/ReactInstanceManager.java

@@ -146,7 +146,11 @@ public abstract class ReactInstanceManager {
    */
   public abstract void onHostDestroy(Activity activity);
 
-  public abstract void onActivityResult(int requestCode, int resultCode, Intent data);
+  public abstract void onActivityResult(
+    Activity activity,
+    int requestCode,
+    int resultCode,
+    Intent data);
   public abstract void showDevOptionsDialog();
 
   /**