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/security/ShowPasswordPreferenceController.java

@@ -58,5 +58,9 @@ public class ShowPasswordPreferenceController extends TogglePreferenceController
                 ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
     }
 
+    @Override
+    public int getSliceHighlightMenuRes() {
+        return R.string.menu_key_security;
+    }
 }