Merge "Enables full-screen user switcher refactor flag." into tm-qpr-dev am: 51305284

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20038954



Change-Id: I53cb7d49680636d11d7011e6f3be467b18f36c6c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>