Only show first 5 items in sound setting until click More.

Bug: 32255863
Test: RunSettingsRoboTests
Change-Id: Ib9449b70e2f2a003b3c6a810d0cc03016d025edb

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

@@ -62,6 +62,12 @@ public class SoundSettings extends DashboardFragment {
     private WorkSoundPreferenceController mWorkSoundController;
     private RingtonePreference mRequestPreference;
 
+    @Override
+    public void onAttach(Context context) {
+        super.onAttach(context);
+        mProgressiveDisclosureMixin.setTileLimit(5);
+    }
+
     @Override
     public int getMetricsCategory() {
         return MetricsEvent.SOUND;