floss: Media/Telephony DBus: Change address type to RawAddress

This brings 2 benefits:
- Make it possible to mask the address in the DBus debugging log
- Don't need to convert the type and handle error in every DBus function

Note that this doesn't really change the DBus API. From the clients'
perspective these DBus args are still String.

Bug: 342337056
Tag: #floss
Test: mmm packages/modules/Bluetooth
Test: Play audio / use mic with BT, verified masked address in the log
Test: bluetooth_AdapterQuickHealth.AVL.all_floss
Test: NearbyShare / PhoneHub / FastPair
Flag: EXEMPT, Floss-only changes
Change-Id: I0f6814434e7d894855dafc7ebf64e4ab409054a8