Merge "Handling statusbar color when back navigation (1/2)" into udc-dev am: 5d9015be am: 9cd195dc

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21551119



Change-Id: Ibf3cd3ef4e5e12a2f70dae57e7cd9d9a28622e92
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>