Introduce BluetoothAudioChannelModePreferenceCtrl

- Create new BluetoothAudioChannelModePreferenceController
 - Create controller inside the DashboardFragment
 - Port logic from DevelopmentSettings into the controller

Bug: 34203528
Test: make RunSettingsRoboTests -j40
Change-Id: I4abe87dd70be83c8b3cf2a3ad43b8856a01eadbb

src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java

@@ -383,7 +383,8 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
                 bluetoothA2dpConfigStore));
         controllers.add(new BluetoothAudioBitsPerSamplePreferenceController(context, lifecycle,
                 bluetoothA2dpConfigStore));
-        // bluetooth audio channel mode
+        controllers.add(new BluetoothAudioChannelModePreferenceController(context, lifecycle,
+                bluetoothA2dpConfigStore));
         // bluetooth audio ldac codec: playback quality
         controllers.add(new ShowTapsPreferenceController(context));
         controllers.add(new PointerLocationPreferenceController(context));