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 am: 1c884cbb am: c47063f1

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

Change-Id: Ib9a616e59f1a1285105f1f214aadcae6011b3329