We finally live in an age when I can tell a clanker that I want an app that does something that I need, connect the phone with adb and in half an hour have a working solution for my tiny problem while knowing little about android development. This is something google should embrace, not kneecap.
Then tell the courts to stop fining them and start fining all the closed platforms.
There is a clear legal asymmetry where allowing competitors on your platform makes you liable if they complain, but blocking out everyone except for yourself is a totally ok and legally rosy way to do business.
Are they such new/fleeting friends that they can't wait 24 hours? Otherwise, it might be a good thing that people can't be persuaded to install an app because a "friend" told them to, and it's somehow so urgent that they can't wait 24 hours.