(android) Mapping save functions to buttons?

Here’s my dilemma. I’m playing via sixaxis to my tablet hooked up to a TV screen. Is there any means of mapping save state functions to my controller so I don’t have to bother either with using an overlay or standing up to run over to my TV to hit the back button to activate the auto backup as it seems unreliable.

I hunted around the install folder for some sort of configuration files as well as the custom bindings but didn’t see any save state functions to use. Any ideas?