Replace preference with remote media preference group in xml

-remove previous preference controller and its test cases
-update sound setting test case

Bug: 147395289
Test: make -j42 RunSettingsRoboTests
Change-Id: I9e383e11370a13868fdbcb76eafef5aedad895c5

tests/robotests/src/com/android/settings/notification/SoundSettingsTest.java

@@ -25,13 +25,13 @@ import static org.mockito.Mockito.when;
 
 import android.content.Context;
 import android.media.AudioManager;
-import android.os.Handler;
 import android.os.UserManager;
 import android.preference.SeekBarVolumizer;
 
 import com.android.settings.R;
 import com.android.settings.testutils.XmlTestUtils;
 import com.android.settings.testutils.shadow.ShadowAudioHelper;
+import com.android.settings.testutils.shadow.ShadowBluetoothAdapter;
 import com.android.settings.testutils.shadow.ShadowDeviceConfig;
 import com.android.settings.testutils.shadow.ShadowUserManager;
 
@@ -48,7 +48,8 @@ import java.util.List;
 public class SoundSettingsTest {
 
     @Test
-    @Config(shadows = {ShadowUserManager.class, ShadowAudioHelper.class, ShadowDeviceConfig.class})
+    @Config(shadows = {ShadowUserManager.class, ShadowAudioHelper.class, ShadowDeviceConfig.class,
+            ShadowBluetoothAdapter.class})
     public void getNonIndexableKeys_existInXmlLayout() {
         final Context context = spy(RuntimeEnvironment.application);
         AudioManager audioManager = mock(AudioManager.class);