Reset settings controllable restrictions in CarUserManagerHelper

This is done through moving the list of settings controllable
restrictions from PermissionsPreferenceController to
CarUserManagerHelper.

Bug: 120482638
Test: Manual (create new user, add restriction to create new user, make
admin, confirm that user can create new users)
Change-Id: I2209c0357ca4648cbed37711dd7be2cb5e7309b2
1 file changed