[xtend][maven][android] Update android xtend maven archetype

* Project can now be compiled and installed from Eclipse
(with Run As) as well as from the command line.
* Debugging works from eclipse (android debug settings are
enabled by default).
* Updated referenced android version to the latest (4.3)
* Updated some android resources to more closely match
the Eclipse wizard generated projects.

Signed-off-by: Stefan Schneider-Kennedy <code@stefansk.name>