There isn't any specific Android support that I'm aware of, but support for multiple programming languages.
If it was me, I'd use https for authentication and API calls.
There's a bunch of sample code in the various languages supported that are included in the SDK.
You may want to check out the basic SDK API programming webinar I gave last year for ITLS and FastLane, NetApp training partners:
I hope this response has been helpful to you.
At your service,
Eugene E. Kashpureff, Sr.
Independent NetApp Consultant http://www.linkedin.com/in/eugenekashpureff
Senior NetApp Instructor, IT Learning Solutions http://sg.itls.asia/netapp
(P.S. I appreciate 'kudos' on any helpful posts.)