Add filtering to notification channel settings

Allow apps that are launching this page to specify targeted subsets of
settings that should be shown.

Test: settings notification robotests
Bug: 177246841
Change-Id: Ib491c43f1861a9775e3b25f39134cdbe105a7ff8

src/com/android/settings/notification/app/SoundPreferenceController.java

@@ -68,6 +68,11 @@ public class SoundPreferenceController extends NotificationPreferenceController
         return checkCanBeVisible(NotificationManager.IMPORTANCE_DEFAULT) && !isDefaultChannel();
     }
 
+    @Override
+    boolean isIncludedInFilter() {
+        return mPreferenceFilter.contains(NotificationChannel.EDIT_SOUND);
+    }
+
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);