Avoid MotionEvent no finish raise unnecessary ANR

In Monkey test. if Trackball MotionEvent and FocusEvent come together.
motionEvent will be put to batches , Didn't call onBatchedInputEventPending due to FocusEvent Return early.
So the motionEvent would't be handled and finish, And the related inputChannel would't receive inputevents due to FocusWindow change.
Finally raise unnecessary ANR.

Change-Id: I0d48b28e446dc8bccd98932b4e07200276a38aa8