Revert change f449c0c381.

Previously, onHoverEvent() would return true if a view was hoverable
and consume the event. After the change, it would return the result of
dispatchGenericMotionEventInternal(). As a result, touch exploration
caused multiple hover events to be sent from every view under a given
touch point. This change reverts to the original behavior and fixes
touch exploration.

BUG: 8723842
Change-Id: I0c7362f19c51bf21ed842711a03b7f02613958d2

core/java/android/view/View.java

@@ -8228,7 +8228,10 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
             // in onHoverEvent.
             // Note that onGenericMotionEvent will be called by default when
             // onHoverEvent returns false (refer to dispatchGenericMotionEvent).
-            return dispatchGenericMotionEventInternal(event);
+            dispatchGenericMotionEventInternal(event);
+            // The event was already handled by calling setHovered(), so always
+            // return true.
+            return true;
         }
 
         return false;