

Why wouldn’t you use a dedicated APK extraction app of your choice to extract the APK file, then send to another device using a file sharing method of your own choice, be it WLAN-direct or even Bluetooth, instead of using Google’s locked-in proprietary tool?
Good thing this is at least very easy to block per-app with a Xposed module.
Although it is quite concerning indeed that there isn’t an easy and explicit way for you to be notified when an app tried to do this on its own, it would be nice to have a tool that can automatically scan an app to see if it does that