[xbmcZ] Adding to Frodo StartAndroidActivity to allow starting Android a...

...pps

similarly to what already exists in the Gotham code base.

Sample call from a plugin (default.py file):
       xbmc.executebuiltin('XBMC.StartAndroidActivity("com.androidemu.gens")')

I compiled spmc with these changes and tested the APK and it does work. It is based on what was suggested in the forum by elmerohueso (http://ouyaforum.com/showthread.php?8220-SPMC-Koying&p=99046&viewfull=1#post99046), with some additional required changes to make it work.