Merge "StatusBar treatment for Letterbox - Add flag to Flags.java" into tm-qpr-dev am: 071f31151e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19246699

Change-Id: Iaaccf866b745ee025ac1a1be92b761d183cc4864
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>