[Audio routing] Setup basic structure for audio routing page

* Setup UI and bridge device address into audio routing fragment

Bug: 237625815
Test: make RunSettingsRoboTests ROBOTEST_FILTER=BluetoothDetailsAudioRoutingFragmentTest
Test: make RunSettingsRoboTests ROBOTEST_FILTER=BluetoothDetailsAudioRoutingControllerTest
Change-Id: Ia7ffe34af54011a2e3cb445fc4fbd00f991835f3
6 files changed