Merge "[Unfold animation] Move unfold animation background under wallpaper"...

Merge "[Unfold animation] Move unfold animation background under wallpaper" into udc-dev am: 11979783 am: a3687621 am: 68e4b22f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22814876



Change-Id: Ibc23920212a9db1f945974e1827f5c11f84c3489
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>