Ad wrapper Android

I´m looking at creating an ad-wrapper for Android apk´s. The advertisment is done on our side, but the actual "ad-wrapper platform" needs to be developed which will allow to wrap any apk with advertisment. This platform should accept different compiled apk´s and wrap the advertisment around it. No additional code work should be needed and apk´s should be working as before. Flow of a wrapped apk: Start of app -> advertisment(skip or if user presses on banner opens link) -> start of actual apk -> close of apk -> close of app More details can be shared with people who have developed similar apps. Thanks!