Merge "[CS] 1/N: Have LockscreenWallpaper listen for user changes directly."...

Merge "[CS] 1/N: Have LockscreenWallpaper listen for user changes directly." into udc-qpr-dev am: 74ddf829

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23816585



Change-Id: Ib12da049d8a8fe8e2cf5e06b0d17d4151e9616ab
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>