[LE Audio] To fix the condition of the broadcast icon display

- The broadcast icon will be displayed when the device is connected to
   the LE Audio device.

 - The broadcast option dialog will show the "Broadcast" option when the
   media is streaming. Otherwise, it will not show.

Bug: 235923182
Test: manual test
Test: make RunSettingsRoboTests ROBOTEST_FILTER=MediaVolumePreferenceControllerTest
Change-Id: Ib225d185b6f15463f4fae809e0cdaa25920d52af

src/com/android/settings/bluetooth/QrCodeScanModeFragment.java

@@ -36,16 +36,15 @@ import android.view.ViewOutlineProvider;
 import android.view.accessibility.AccessibilityEvent;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.StringRes;
+
 import com.android.settings.core.InstrumentedFragment;
 import com.android.settingslib.R;
 import com.android.settingslib.bluetooth.BluetoothBroadcastUtils;
 import com.android.settingslib.bluetooth.BluetoothUtils;
-import com.android.settingslib.core.lifecycle.ObservableFragment;
 import com.android.settingslib.qrcode.QrCamera;
 
-import androidx.annotation.NonNull;
-import androidx.annotation.StringRes;
-
 public class QrCodeScanModeFragment extends InstrumentedFragment implements
         TextureView.SurfaceTextureListener,
         QrCamera.ScannerCallback {
@@ -232,8 +231,7 @@ public class QrCodeScanModeFragment extends InstrumentedFragment implements
     }
 
     private void updateSummary() {
-        mSummary.setText(getString(R.string.bt_le_audio_scan_qr_code_scanner,
-                null /* broadcast_name*/));;
+        mSummary.setText(getString(R.string.bt_le_audio_scan_qr_code_scanner));
     }
 
     @Override