How can I create _one_ APK file with Android Studio which includes the app and all asset packs to manually install the app?

  android, android-studio

I have an Android app with several asset packs (install-time delivery) where I put larger files needed for the application. I need to make this split because otherwise the apk is too large for the upload into play store.

Now I want to build an apk file which I can share with my test users via some private file sharing so they can just download the apk and install the app with all asset packs included. When I run "build apk" then the apk contains only the app, not the asset packs. When I run "build bundle" the bundle contains the asset packs, but it cannot be installed on the phone.

What do I have to configure in Android Studio to build an apk with all the asset packs included?

Source: Android Questions