Add ability to show/hide individual settings in Sounds page.

This adds the following 7 new boolean flags:
config_show_alarm_volume
config_show_charging_sounds
config_show_media_volume
config_show_notification_ringtone
config_show_notification_volume
config_show_screen_locking_sounds
config_show_touch_sounds

Which when set to false, will hide the respective preferences in Sounds
page.

Bug: 69813881
Test: make RunSettingsRoboTests
ROBOTEST_FILTER=com.android.settings.notification all pass.

Change-Id: I84a2ce66b07c00d658422ce1a0eacaf9a01fae8a

src/com/android/settings/notification/TouchSoundPreferenceController.java

@@ -23,6 +23,7 @@ import android.content.Context;
 import android.media.AudioManager;
 import android.os.AsyncTask;
 import android.provider.Settings.System;
+import com.android.settings.R;
 import com.android.settings.SettingsPreferenceFragment;
 import com.android.settingslib.core.lifecycle.Lifecycle;
 
@@ -53,4 +54,9 @@ public class TouchSoundPreferenceController extends SettingPrefController {
             }
         };
     }
+
+    @Override
+    public boolean isAvailable() {
+        return mContext.getResources().getBoolean(R.bool.config_show_touch_sounds);
+    }
 }