Merge "Full-screen user switcher is now scrollable." into tm-qpr-dev am: 5e093f4a am: a287ac13

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20306244



Change-Id: Ia056c17a6dbf82c53e871d5a3816a282eb931a60
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>