Also make the back button go back to the OS home from the rockbox main menu
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28475 a1c6a512-1295-4272-9138-f99709370657
* Forward Java KeyEvents to C layer and translate them to Rockbox BUTTON_*.
* Add a basic Android keymap
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27832 a1c6a512-1295-4272-9138-f99709370657