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

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



Change-Id: Icbb07d927fdfc564d4b23b47df8b0f205f5e109f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>