Merge "Update the navbar surface when the nav bar is detached" into udc-dev am: 05f4f569

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21891001



Change-Id: Ic464ddc719af05539a7afd404eb22301bc15e859
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>