如何修改AOSP以允许特定应用程序获得root访问权限？

I'm working on AOSP. I've successfully added my apk to build. Now I want to give root access to my app. I don't want to provide root access to other apps or to install the Superuser app in my build. I just want to add my app to get root access. How can I achieve that?. I've successfully added my