Sync Preference in UI for new cached device

Use Case: Inquiry results not updated to UI when A2DP
streaming is initiated.

Failure: Inquiry results updated to settings APP but
it's not reflecting in UI.

Steps:
1. A2DP streaming from DUT.
2. OPP Rx initiated from remote.
3. Initiating inquiry from DUT.

Root Cause: No callback to UI to sync the preference
parameter of new cached device in DeviceFoundHandler class.

Fix: Create preference in UI whenever new cached device is added.

Change-Id: Ib02f953f4dc6e3a74fac70442dc7959504ca9374