Merge "Wallpaper animation for keyguard unlocking." into udc-dev am: 6f0ed612 am: 93b00965

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22336604



Change-Id: Ic6f15e4ee236ef7d13255a7ed1cc3f0829baa545
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>