It's maintained by Google, which is pretty much the same thing - in the end, they get to decide what features get implemented and what doesn't make the cut. Sure we can fork it, and we can make our own, but in the end as long as their code is the main base, they have a lot of control over all the different forks, as usually the forks will have to keep rebasing their code off of new updates to stay as secure and up to date as possible.