fix(mobile): add fake changes comment in karma config

- Insert a comment line "// fake changes" at the end of karma.conf.js
- Add an extra blank line after the comment for spacing improvement

Author: EndyKaufman

mobile/karma.conf.js

@@ -42,3 +42,5 @@ module.exports = function (config) {
     restartOnFileChange: true
   });
 };
+
+// fake changes