End drag touch event when crossing task drag threshold, and only when task is going up (drag to dismiss) am: 49cb49b1f5 am: 765b8dc7c2

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14800534

Change-Id: Ic13d8803b5a5a9ad7fd52edf431cb26db89338db