Merge "Reduce unnecessary redraw of wallpaper when switching orientation" into udc-dev am: 72d126cd am: c9e99e46 am: 0e279d9a am: 5148996c

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



Change-Id: I5b955898a98a6aafd0d9e254cf38032be891ec26
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>