Merge "[DO NOT MERGE] User switcher activity - use immersive mode" into tm-qpr-dev am: 2ce1a3a4

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20195509



Change-Id: I97450d1d0169f1a7959b6b6edcc33c6410cfdd9f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>