[automerger skipped] Merge "[DO NOT MERGE] Animate dialog stack and use in UserSwitcher" into sc-v2-dev am: 4ad4975b28 am: f61145bb93 -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16244707

Change-Id: I0d819bb2ab4309130efa80fcc6cc920efecac3a0