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/display/AutoBrightnessPreferenceController.java

@@ -61,4 +61,9 @@ public class AutoBrightnessPreferenceController extends TogglePreferenceControll
                 ? R.string.auto_brightness_summary_on
                 : R.string.auto_brightness_summary_off);
     }
+
+    @Override
+    public int getSliceHighlightMenuRes() {
+        return R.string.menu_key_display;
+    }
 }