wrap an exisiting apk app inside other create by our own.

i have a movie app, in which i dont posses source code, i just have the apk, the app works fine, but i wanna control the login for users & time that the app can be available for usage, like apk file cant be modified (cuz i dont have the source code), i think that wrap that app inside a short dev app which could be done for you, can manage this problem. If you can make this, postulate