Merge "[RESTRICT AUTOMERGE]BackGestureAnimation: a lightweight recents animation controller" into tm-qpr-dev am: 4ec0b52029

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19394174

Change-Id: I17af9175b79a725248a21acccb4c8a296745c03f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>