It’s fairly obvious by now that iOS and Android are the top dogs in mobile, so the battle is on for the third platform player. I wrote off BlackBerry a while ago, and got some confirmation of that Thursday. Windows Phone is looking better and better to be No. 3 to my eyes, but mobile analytics firm Flurry suggests a different player. Based on 11 million data points, Flurry suggests that Amazon is the one to watch, even though its “platform” is built upon Android.