Merge "Move ImmersiveModeConfirmation to system UI (4/n)" into udc-qpr-dev am: 640ee87eea

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23467207

Change-Id: I79f9f48ff7d7ca8b3901fa23ebc7984873897364
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>