added Droidium container configuration

Added configuration options for Arquillian Droidium container.

This container is not in Maven Central right now but this commit is fully workable with local installation of it (0.0.1-SNAPSHOT).

The release of 1.0.0.Alpha1 is planned on late August 2013.

https://github.com/arquillian/arquillian-droidium
https://github.com/arquillian/arquillian-droidium/tree/master/droidium-container