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/uwb/UwbPreferenceController.java

@@ -162,5 +162,10 @@ public class UwbPreferenceController extends TogglePreferenceController implemen
             return mContext.getResources().getString(R.string.uwb_settings_summary);
         }
     }
+
+    @Override
+    public int getSliceHighlightMenuRes() {
+        return R.string.menu_key_connected_devices;
+    }
 }