Revamp touch event dispatching methods

Summary:
There are two methods in ReactRootView to handle touch events "onInterceptTouchEvent" and "onTouchEvent", for Venice we have ReactSurfaceView inherits ReactRootView but the implementation for above 2 touch handling methods still calls into it's super implementation which uses the bridge.

In this diff we make ReactSurfaceView inherits ReactRootView's "dispatchJSTouchEvent" and "dispatchJSPointerEvent". So that Venice has separate implementation for touch events handling.

Changelog:
[Android][Changed] - Revamp touch event dispatching methods

Reviewed By: fkgozali, JoshuaGross

Differential Revision: D36629466

fbshipit-source-id: fb7c5950afe6249d22edd3fac3fa5d3b83b3af84

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

@@ -338,7 +338,7 @@ public class ReactRootView extends FrameLayout implements RootView, ReactRoot {
     super.requestChildFocus(child, focused);
   }
 
-  private void dispatchJSPointerEvent(MotionEvent event) {
+  protected void dispatchJSPointerEvent(MotionEvent event) {
     if (mReactInstanceManager == null
         || !mIsAttachedToInstance
         || mReactInstanceManager.getCurrentReactContext() == null) {
@@ -361,7 +361,7 @@ public class ReactRootView extends FrameLayout implements RootView, ReactRoot {
     }
   }
 
-  private void dispatchJSTouchEvent(MotionEvent event) {
+  protected void dispatchJSTouchEvent(MotionEvent event) {
     if (mReactInstanceManager == null
         || !mIsAttachedToInstance
         || mReactInstanceManager.getCurrentReactContext() == null) {