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: 56529d0f

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



Change-Id: Ib26d0c5f776e33ae9fe99f2b93da107fef757bb3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>