code: protected void propagateOnMotionOutside(MotionEvent event)
      {
          if (mEventOptions.contains(EventOptions.SEND_TOUCH_EVENTS))
          {
              if (mEventOptions.contains(EventOptions.SEND_TO_LISTENERS))
              {
                  getGVRContext().getEventManager().sendEvent(this, ITouchEvents.class, "onMotionOutside", this, event);
              }
              if (mEventOptions.contains(EventOptions.SEND_TO_SCENE) && (mScene != null))
              {
                  getGVRContext().getEventManager().sendEvent(mScene, ITouchEvents.class, "onMotionOutside", this, event);
              }
          }
      }
docs: Propagate onMotionOutside events to listeners
  @param MotionEvent Android MotionEvent when nothing is picked