Migrate from using userId to UserHandle for better type safety

Also renamed:
 - BaseQSTileViewModel to QSTileViewModelImpl
 - QSViewModelFactory to QSTileViewModelFactory

Test: atest DisabledByPolicyInteractorTest
Test: atest QSTileViewModelInterfaceComplianceTest
Bug: 299908705
Change-Id: Ie66ddc8d8788906840196e77d7851c4e1b9e69d9
15 files changed