Flipboard, the app that collects social media streams and news and presents them in a "magazine" on your mobile devices, has launched for Google's (GOOG) Android operating system. The app, which has been available only on Apple's (AAPL) mobile operating system, combines streams from social networks like Twitter, Instagram and Facebook (FB) into an almost eBook-like format. The app also pulls stories from news sites, including USA Today, The Verge