Add emitting view to onChildStartedNativeGesture callback

Summary:
Changelog:
[Android][Changed] RootView's onChildStartedNativeGesture now takes the child view as its first argument

Reviewed By: philIip

Differential Revision: D31399515

fbshipit-source-id: b9438f6118e604a04799ef67d0b46303a06d6434

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

@@ -8,6 +8,7 @@
 package com.facebook.react.uimanager;
 
 import android.view.MotionEvent;
+import android.view.View;
 
 /** Interface for the root native view of a React native application. */
 public interface RootView {
@@ -16,7 +17,10 @@ public interface RootView {
    * Called when a child starts a native gesture (e.g. a scroll in a ScrollView). Should be called
    * from the child's onTouchIntercepted implementation.
    */
-  void onChildStartedNativeGesture(MotionEvent androidEvent);
+  void onChildStartedNativeGesture(View childView, MotionEvent ev);
+
+  /** @deprecated */
+  void onChildStartedNativeGesture(MotionEvent ev);
 
   void handleException(Throwable t);
 }