Merge "Update lock screen user switcher on settings update and re-create view...

Merge "Update lock screen user switcher on settings update and re-create view stub after disabling multi-user" into sc-dev am: cdd6adb5

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14974991

Change-Id: I484cd529452a89ea0aa5d117c8a68338e0c10e1a