As the delay is added as WaitEvent, throttle time is applied after
the WaitEvent. This cause problem for Tap and Drag. The thorrle time
is then inserted between ACTION_DOWN and ACTION_UP, or ACTION_DOWN
and ACTION_MOVE. This broke the two actions.
Change-Id: I5a122d6cb3d99e38d9442c3de50e0360652c4baf