This is a roll forward of two reverted changes combined into one:
commit b6d0441662
commit e5e51116fb
It additionally fixes an issue where in multi-user profiles (such as a guest user), rules would be incorrectly identified as not created by the system and would therefore fail to be created in settings.
Bug: 257477671
Bug: 245236706
Bug: 242537431
Test: NotificationManagerServiceTest; ZenModeHelperTest; manually verified that it's possible to create zen schedules from guest mode
Change-Id: I0c4c705cfe5fc875151958957daaf8657fbc21a7
Merged-In: I0c4c705cfe5fc875151958957daaf8657fbc21a7
(cherry picked from commit 7261cdd30b)