Extract the not-strictly-modes-related parts of ZenModesBackend

So that when it's moved to SettingsLib, it doesn't need to carry that baggage.

Bug: 346519570
Test: atest com.android.settings.notification.modes
Flag: android.app.modes_ui
Change-Id: I7911a521d96f5dbac2c2395171d324b7b54b8b07

src/com/android/settings/notification/modes/ZenModeNotifVisLinkPreferenceController.java

@@ -31,9 +31,9 @@ class ZenModeNotifVisLinkPreferenceController extends AbstractZenModePreferenceC
     private final ZenModeSummaryHelper mSummaryBuilder;
 
     public ZenModeNotifVisLinkPreferenceController(Context context, String key,
-            ZenModesBackend backend) {
+            ZenModesBackend backend, ZenHelperBackend helperBackend) {
         super(context, key, backend);
-        mSummaryBuilder = new ZenModeSummaryHelper(context, backend);
+        mSummaryBuilder = new ZenModeSummaryHelper(context, helperBackend);
     }
 
     @Override