The old way documented here https://developers.google.com/android/guides/setup appears to be no longer up to date.
Here's a relevant stack overflow link: http://stackoverflow.com/questions/37310684/missing-sdk-extras-google-google-play-services-libproject-folder-after-updat
Is there an easy way to point buildozer at the aar files? Or is the best thing for now just to download an older rev of the play services lib?