[Pair hearing devices] Add pair hearing device functionality

* Add setFilter(List<ScanFilter>) in DeviceListPreferenceFragment to enable BluetoothLeScanner

Bug: 237625815
Test: make RunSettingsRoboTests ROBOTEST_FILTER=DeviceListPreferenceFragmentTest
Test: make RunSettingsRoboTests ROBOTEST_FILTER=HearingDevicePairingDetailTest
Change-Id: I13495cad7260789845fad9a7e77e96b692a5cbd0
8 files changed