The Android smartphone platform is at 2.3.4 "Gingerbread". 3.0 is "Honeycomb" and is tablet-only. The next release "Ice Cream Sandwich" will merge both platforms.
Considering AppGameKit is based on a virtual machine, I would imagine that your code will run on whatever platform the VM will run on.
I don't think there will be any way to tell if AppGameKit will run on any newer version until it's attempted. I'm going to guess that there will be a minimum version (most likely 2.0-ish) and then it will "just work" until it breaks.