Hi John,
As far as I know there is nothing in that side yet. But is something that I would really like to see happening soon. Do you have previous experience in Android development?
I can give you some pointers from the jBPM side, but not for android. One of the things that I've being working lately is the new jbpm console ng, which uses the Human Task Services, so we can use those services to create the android app as well.
If you are interested in collaborating with such project, let me know. The same for the console side.
Cheers