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: 47e1b24e

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



Change-Id: I036d5b4961efab03a4b538038a3257313ca50cb9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>