DeviceGroup: Frameworks changes (for dual mode devices).

This change contains implementation of overloaded API's
to get device details based on public address.
Note: API's are hidden and should be used only from
      settingslibs LocalBluetoothProfile.

CRs-Fixed: 2826578
Change-Id: I9b1f08f4bd5eee8fd66fc032745d3ec5b56e7c2f