What is the logic of the android game?

Question

Android

Hello.
There is an app https://play.google.com/store/apps/details?id=com.... that interacts (patches) https://play.google.com/store/apps/details?id=com. ...
For the first application, I would like to know the following:
1) How maps are installed in the game
2) How add-ons are installed in the game
3) How skins are installed in the game
4) How textures are installed in the game
Of course, the process of downloading a file from their server is not of interest, and the very moment of interaction with the game. How does he patch?