Remove hearing device local data when the device is unpaired

Clear local data if the device is unpaired. The device address will be
different if the same device is paired again.

Flag: com.android.settingslib.flags.hearing_devices_ambient_volume_control
Bug: 357878944
Test: atest HearingDeviceLocalDataManagerTest
Test: atest CachedBluetoothDeviceManagerTest
Change-Id: Ice8a1f32bbad9a3d2ca75122ff799b8439665695