Every open source project has someone (or some group) in control, and contributions can't land without their say so. But anyone who feels that the current leadership is doing it wrong can fork the code and try to persuade people to use their version. This is very important to the way open source software works.

Google have a level of control beyond that: they undermine anyone trying to fork Android by not letting them use Google's apps and services (even as they allow such use on competing systems like iOS).