[HA Status] Notify hearing devices connection status

* The hearing devices connection status will be used to show different hearing device icon status. It will show on Floating Accessibility Menu for this feature.
* Check hearing devices connection status when profile status chagned, active device changed, and unpair device.
* Hearing devices connection status is connection status for singular or binaural devices. For example: One of hearing device is in CONNECTED status and another is in DISCONNECTED the hearing devices connection status will notify CONNECTED status.
* The stauts report priority is connecting_or_disconnecting > active > connected > disconnected

Bug: 357882387
Test: atest CachedBluetoothDeviceManagerTest CachedBluetoothDeviceTest HearingAidDeviceManagerTest LocalBluetoothProfileManagerTest
Flag: com.android.settingslib.flags.hearing_device_set_connection_status_report
Change-Id: I31c91b1d23b7487c69ac6156e9003ece667d15cd