title: OnUp event on GestureDetector
body: <p>My question is simple, where's the onUp event when implementing a <code>GestureListener</code>?</p>
  <p>I has a lot of events on the gesturedetector, and cannot just consume the onUp event of the listener, cause one of events are the <code>onSingleTapConfirmed</code> that needs it.</p>