[Catalyst] Use hybrid mode for sound screen

Bug: 360015496
Flag: com.android.settings.flags.catalyst_sound_screen
Test: atest SoundScreenTest
Change-Id: Ifd685f8e3a546e8750a593201362540f60a3c031

src/com/android/settings/notification/SoundScreen.kt

@@ -36,12 +36,13 @@ class SoundScreen : PreferenceScreenCreator {
 
     override fun isFlagEnabled(context: Context): Boolean = Flags.catalystSoundScreen()
 
+    override fun hasCompleteHierarchy() = false
+
     override fun fragmentClass(): Class<out Fragment>? = SoundSettings::class.java
 
-    override fun getPreferenceHierarchy(context: Context) =
-        preferenceHierarchy(this) {}
+    override fun getPreferenceHierarchy(context: Context) = preferenceHierarchy(this) {}
 
     companion object {
         const val KEY = "sound_screen"
     }
-}
+}