Merge: A little fix to android::audio

Merge: A little fix to android::audio

As explained in PR #1587, there is a bit of a problem when making applications which runs on both linux and android about the loading of the sounds

This PR just reverse the order of the loading for the android audio API, so that if you want to use the sounds in the res folder for your android application, and the sounds in the assets folder for the linux application, you just have to create a new sound with its extension and it will work fine :)

Edit: It also enables the use of different sound formats between android and Linux

Pull-Request: #1592
Reviewed-by: Jean Privat <jean@pryen.org>
Reviewed-by: Alexis Laferrière <alexis.laf@xymus.net>