Run on Android without installing APK

Hi guys, a friend of mine is making an (educational) game that is composed of modules, and each module is a single Unity game since new modules are created very often and need to be published to the user.

It will be a mess to put all modules on the App Store, and even worse to place new ones when available, so the idea is to create an single Android App that manages the modules (Unity Games), download new ones, and also play the games without installing the APK game on the mobile (because will be a mess the 15, 25 or 50 apps installed on user's phone too)

The question:

Can I have Unity game files (source code, APK or other binary format) and run it on Android? without installing as an app?

Like game emulators, that emulator is an app it can execute the games without installing, is that possible with unity games?

I'm not an Unity developer, so I don't know if Unity provides some app that run unity games, or some API that make it possible.