Bug 831144 - Add Android XBL key bindings; r=neil

--HG--
rename : content/xbl/builtin/unix/Makefile.in => content/xbl/builtin/android/Makefile.in
rename : content/xbl/builtin/unix/jar.mn => content/xbl/builtin/android/jar.mn
Bug 831144 - Properly pass meta states to Gecko; r=cpeterson