Merge "Reduce unnecessary redraw of wallpaper when switching orientation" into udc-dev am: 72d126cd am: 91f472e9 am: 185ebc3a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23444291



Change-Id: If207daf7ad0a35ee89178c7386fbc1be419fff5d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>