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

tests/robotests/src/android/bluetooth/BluetoothCodecConfig.java

@@ -30,6 +30,7 @@ public class BluetoothCodecConfig {
     public static final int BITS_PER_SAMPLE_NONE = 0;
     public static final int CHANNEL_MODE_NONE = 0;
     public static final int BITS_PER_SAMPLE_24 =  0x1 << 1;
+    public static final int CHANNEL_MODE_STEREO = 0x1 << 1;
 
     public int getSampleRate() {
         return 0;
@@ -42,4 +43,8 @@ public class BluetoothCodecConfig {
     public int getBitsPerSample() {
         return 0;
     }
+
+    public int getChannelMode() {
+        return 0;
+    }
 }