SwipeDenier doesn't work with GestureDetector for fling

Here is a fragment of `OnGestureDetectorListener` for `GestureDetector` used on `shouldDenySwipe()` – basically `onFling` is never called.

``` java
OnGestureListener gestureListener = new SimpleOnGestureListener() {

@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
if (e1.getX() < e2.getX()) {
// do some action
return true;
}
return false;
}
};

@Override
public boolean shouldDenySwipe(MotionEvent motionEvent) {
return gestureDetector.onTouchEvent(motionEvent);
}
```