The "open source" posturing is very annoying. They're just doing it for the PR.
Even considering the subset of Android that is "open source" the development process is closed and we just get code drops after product releases. It's like Apple used to do when they were playing the game with Darwin. They're doing a lot of work to avoid and purge LGPL and GPL code so they can work this way. It's not even free to use for vendors, you need to pay licensing fees to get a useful system out of it and sign contracts subjecting you to Google's whims.
Even considering the subset of Android that is "open source" the development process is closed and we just get code drops after product releases. It's like Apple used to do when they were playing the game with Darwin. They're doing a lot of work to avoid and purge LGPL and GPL code so they can work this way. It's not even free to use for vendors, you need to pay licensing fees to get a useful system out of it and sign contracts subjecting you to Google's whims.