UCI engine support for Android

[abik]

In Chess for Android, I currently use a built-in engine, basically a simplified Java port of the C++ engine BikJump. However, it makes sense to add UCI support in the GUI as well, which will enable importing any UCI engine that has been compiled "natively" for Android using the Android NDK. Therefore, I have been prototyping UCI support in Chess for Android. Some initial results of importing a natively compiled UCI engine as a "kibitzer" can be found on my blog (http://aartbik.blogspot.com/). For now, I am testing a natively compiled BikJumpv1.8, but feel free to send me other UCI engines compiled for Android if you want to expose those to early testing.