fix memory leak

Author: Kaushik Iska

shell/platform/android/io/flutter/embedding/android/AndroidTouchProcessor.java

@@ -176,7 +176,8 @@ private void addPointerForIndex(
       return;
     }
 
-    MotionEventTracker.MotionEventId motionEventId = motionEventTracker.track(event);
+    // TODO (kaushikiska) : pass this in when we have a way to evict framework only events.
+    // MotionEventTracker.MotionEventId motionEventId = motionEventTracker.track(event);
 
     int pointerKind = getPointerDeviceTypeForToolType(event.getToolType(pointerIndex));
 
@@ -187,7 +188,7 @@ private void addPointerForIndex(
 
     long timeStamp = event.getEventTime() * 1000; // Convert from milliseconds to microseconds.
 
-    packet.putLong(motionEventId.getId());
+    packet.putLong(0);
     packet.putLong(timeStamp); // time_stamp
     packet.putLong(pointerChange); // change
     packet.putLong(pointerKind); // kind