Merge "Overlap navbar with letterboxed immersive app" into udc-dev am:...

Merge "Overlap navbar with letterboxed immersive app" into udc-dev am: 413f5c5a am: 59b1c951 am: 25c427c1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23048497



Change-Id: Icd61b80392584c1af01e2369e8b7050830521cb5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>