MultiUserPerfTest - test restart profile

Creates a profile, starts it, stops it, then restarts it, timing how
long the restart takes. This gives an indication of how long it takes to
start a previously-initialized profile, and mimics toggling
setQuietModeEnabled.

Right now, this process is especially slow due to
RoleManagerService.onStartUser(), so it is worthwhile tracking this.

Bug: 129415917
Test: atest  android.multiuser.UserLifecycleTests#managedProfileUnlock_stopped
Change-Id: Ic7f3bdb6fa7daaab53cb23dbf8e8a68e293d23b2