Merge "Do not show animation background with wallpaper transition" into tm-dev am: dc19fc3b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17665554



Change-Id: I467743855218d81827033e4677a64dab4a158fa0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>