I couldn't find the reason but Android development was discontinued a few months ago. It might be problems that the parent wine project is having on newer Android OS. I believe the stuff related to it was removed about 10 days ago [0], but not before one last bit of code related to building for android was added. [1]

[0] https://github.com/AndreRH/hangover/commit/73a88ff807e308862...

[1] https://github.com/AndreRH/hangover/commit/c61a3a58be78e2717...