Merge "Show toast for invisible systemUI" into udc-dev am: 40cea2ef

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22513767



Change-Id: Ibbc13e2e184eb6496f37e2cda1b00d122bfc175e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>