Hi Tom,
This sounds essentially impossible to me.
The .eap file contains a Microsoft Jet database, so first you'd need Jet database drivers for those platforms, and I'm not at all sure there's an app for that.
Then, if you somehow manage to clear that hurdle, there aren't any diagram images stored in the database: the EA client renders them on the go. So all you get from looking at the database is the various tables (t_package, t_object, t_attribute, t_connector, t_......), you don't get anything that looks like UML.
The simplest way to read (not update) models in this situation would be to dump the models to HTML beforehand and point the tablet's browser to that.
If EA had a fully-fledged OSLC implementation, that would work for both reading and updating models from a browser, but the current offering is more of a proof-of-concept than anything else, and I don't expect any massive development efforts in that area any time soon.
/Uffe