Merge "Actually trigger back action on Back Arrow fling" into tm-qpr-dev am:...

Merge "Actually trigger back action on Back Arrow fling" into tm-qpr-dev am: 6c11adfa am: 5f9c7662

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19484845



Change-Id: I272ebb657d2ccb14e6c6e7d28cb78e7320a15215
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>