It's unlikely to meet an antitrust threshold because it's a single example of incompetence rather than policy - the Google Play store developer guidelines and agreements do permit this functionality, it's just that there is no functioning review process when people cock up.

You would probably have to demonstrate that it was a systemic problem before you could make anti-trust stick.

This is not legal advice. I am an idiot on the internet and I could say anything on my qualifications and you would have no idea if it were true.