Merge "Let notification shade control system bar visibility" into tm-qpr-dev am: a71f02fb

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19622684



Change-Id: Iae5ba2aa71c0fee9178c00b2e6a44a01ad6f7709
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>