Merge "Fix surface didn't fade out when dismiss" into udc-dev am: 7e387fc7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23597525



Change-Id: If31cf210429095d05e1253a188f82ab137fc4dc3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>