I just sent up a few monster code reviews that move the android backend into contrib, I tried to break it up in a way that made review at least possible. https://rbcommons.com/s/twitter/r/3526/ gets the android backend green and fixes the example projects. CR 3530 does the mostly mechanical creation of the android.contrib module. CR 3531 removes any special casing that was patched into core to handle the fact that android was it's own backend.