Merge "Include the wallpaper visibility change in the existing keyguard...

Merge "Include the wallpaper visibility change in the existing keyguard unlocking transition" into udc-dev am: dc80918e am: dd04728e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22336603



Change-Id: Ia69fd77c50a1d549df57da73d69db9693b32229f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>