Merge "Fix back to home animation restarts on a second swipe." into tm-qpr-dev am: a33be48b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19562536



Change-Id: I81bca28c3c55c6d935986e144761b3a42af7e1c3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>