Guard slices from being requested by guest user

According to patch of A-231987122, AOSP restricts app to modify relevant
mobile settings when user is a guest. This change intends to prevent the
slices related to mobile settings from being requested by guest user.

Bug: 278616139
Bug: 277333776
Bug: 262244832
Bug: 278616520
Bug: 278615120
Test: robotests
Change-Id: I4dc4bbfdb5cf76e188e6f62ebfd74ef6fa2fe33b