Add highlight menu keys for all toggle pref controllers and custom slices

Bug: 204695404
Test: manual, robotest build pass, unit
Change-Id: Iad2e28ada8ddb766ffa7eff2c8dc581250cbd6f8

src/com/android/settings/network/telephony/TelephonyTogglePreferenceController.java

@@ -65,6 +65,12 @@ public abstract class TelephonyTogglePreferenceController extends TogglePreferen
         return false;
     }
 
+    @Override
+    public int getSliceHighlightMenuRes() {
+        // not needed since it's not sliceable
+        return 0;
+    }
+
     /**
      * Get carrier config based on specific subscription id.
      *