[Catalyst] Use hybrid mode for display screen

Bug: 368359268
Flag: com.android.settings.flags.catalyst_display_settings_screen
Test: atest DisplayScreenTest
Change-Id: I5eed12ee5c596bee4c21c6e3aa9f3db0e0227bff

src/com/android/settings/display/DisplayScreen.kt

@@ -34,6 +34,8 @@ class DisplayScreen : PreferenceScreenCreator, PreferenceAvailabilityProvider {
 
     override fun isFlagEnabled(context: Context) = Flags.catalystDisplaySettingsScreen()
 
+    override fun hasCompleteHierarchy() = false
+
     override fun fragmentClass() = DisplaySettings::class.java
 
     override fun getPreferenceHierarchy(context: Context) = preferenceHierarchy(this) {}