The legal definition matters a lot if someone is trying to argue that VW advertising Android features is supposed to include GrapheneOS
reply> Using anticompetitive and monopolistic tools is not the right of application developers.
Please talk to an actual lawyer before making legal claims, because to be blunt it's very clear you don't know what many of those terms mean in a legal context. VW is not a "monopoly". They have no obligation to allow the use of their software on platforms they don't want.
The legal definition of the OS does not matter at all when considering the difference between failing to support something, and using a tool that explicitly stops something from working that otherwise works without issue. Play integrity is a tool which does not base any of its certification decisions in privacy or security, rather leverages it for anticompetitive reasons. This is known and trivially verifiable.
replyI do know what these terms mean in a legal context. I am claiming that play integrity is an anticompetitive and monopolistic tool, of which VW decided to use. I am not claiming VW is a monopoly. What you are claiming is their right to do, is not their right at all, and is illegal.