Replace UserRestriction listener with an intent

Because Bluetooth is going mainline, we need to remove call to hidden
API.
UserManagerInternal and UserRestrictionsListener are hidden.

There is a available Intent: ACTION_USER_RESTRICTIONS_CHANGED to
advertise when we need to ask for the new restriction
Using both registerReceiverForAllUsers and getSendingUser allow us to
retrieve the user it was intended for

Bug: 211851706
Test: Build + start bt
Tag: #refactor
Change-Id: I4924c4a1cc1388015aa1f9b0ab2c47b470d93871