I fixed it!!! I looked in the NeuroSky.jar file and their was a lib directory with a .DS_Store file in it, but no references to the armeabi or armeabi-v7a folders, and certainly no .so files. My suspicion was that since this was a B4A wrapper only it was not wrapping any native code libraries. So I just repackaged the .jar without the lib folder and voila! compatilble with over 6000 devices.
That was an elusive problem, but one I will not soon forget. Whew!