Floss: Wire remote address type to DBus

This exposes a new DBus API: GetRemoteAddressType in adapter interface.
Clients can call this to know the address type of the remote is public
or random.

Bug: 290872223
Test: mma -j
Test: pair an LE device and a classic device manually and verify the
address type shown in btclient is matched with the bt_config.conf.

Change-Id: I8ca09230eaee406768b2ea5697d128e111a0212a