If only I was a senior VP. :) There are many many Googlers who would like projects to be more open source than they are, since the company has aggressively hired people who value open culture. It's not always possible, I don't know the Android team's constraints, but I would gather if you're working with an OEM on a new secret device, they don't want hints of it leaking in the public repository. :(
Not that it would be an easy transition but the long-term value from all the communities would be in Google's favor..