Register User change only for pbap & avrcp

All profiles were registere to user switch/unlocked but no profile is
using it.
Reducing the number of broadcastReceiver by only registering the profile
that use it.
This should be a no-op change

Test: atest BluetoothInstrumentationTests
Bug: 262605980
Change-Id: Ib1c16250da8bb5a370cf5b950237430b2c729f4f