One of Engadget's must-have Android apps of 2010 is about to make its exit -- soon Audiogalaxy will be no more. The music streaming app's team announced that it has been acquired by Dropbox and will be sunsetting the service during the transition. Rather than streaming music from an anonymous server in the cloud, Audiogalaxy piped music (including playlists and album art) to your smartphone from your own home PC -- all this after returning from the ashes of its previous iteration as the best music file