Merge "Add pre-threshold fling vibration for Back gesture" into udc-qpr-dev am: 0b9abd87b6 am: 3593870565

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/25224776

Change-Id: I39456be992ccfb885c2db0c27ba3ccab6125fc0a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>