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 am: 15d0fa46 am: 1a664c3e

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



Change-Id: I83f34f3d80e97d6a323d75735998218e3b0cb8a5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>