Android: Added back touch event handling based on reactTag

Summary:
It turned out the previous attempt to rely on the Event's UIManagerType wasn't sufficient, as not all Fabric touch event had a surfaceId set on them, e.g. Modal etc.

This brings back the UIManagerType detection based on reactTag, but do it only for non-rootView to keep handling touch via the right dispatcher for rootView as well.

Changelog: [Fixed][Android] Bring back non-rootview touch handling based on reactTag

Reviewed By: JoshuaGross, sshic

Differential Revision: D37063335

fbshipit-source-id: 76e2d7ae5f00006c5ecaf50c86920ea6e85155b7

ReactAndroid/src/main/java/com/facebook/react/uimanager/events/Event.java

@@ -12,6 +12,7 @@
 import com.facebook.react.common.SystemClock;
 import com.facebook.react.uimanager.IllegalViewOperationException;
 import com.facebook.react.uimanager.common.UIManagerType;
+import com.facebook.react.uimanager.common.ViewUtil;
 
 /**
  * A UI event that can be dispatched to JS.
@@ -80,7 +81,14 @@ protected void init(int surfaceId, int viewTag, long timestampMs) {
     // non-Fabric UIManager, and we cannot use the ViewTag for inference since it's not controlled
     // by RN and is essentially a random number.
     // At some point it would be great to pass the SurfaceContext here instead.
-    mUIManagerType = (surfaceId == -1 ? UIManagerType.DEFAULT : UIManagerType.FABRIC);
+    @UIManagerType
+    int uiManagerType = (surfaceId == -1 ? UIManagerType.DEFAULT : UIManagerType.FABRIC);
+    if (uiManagerType == UIManagerType.DEFAULT && !ViewUtil.isRootTag(viewTag)) {
+      // TODO (T123064648): Some events for Fabric still didn't have the surfaceId set, so if it's
+      // not a React RootView, double check if the tag belongs to Fabric.
+      uiManagerType = ViewUtil.getUIManagerType(viewTag);
+    }
+    mUIManagerType = uiManagerType;
 
     mTimestampMs = timestampMs;
     mInitialized = true;