Google CEO Larry Page today announced that Andy Rubin is stepping down as head of the company's Android division, turning over the reins to Sundar Pichai, who has led Google's Chrome and Apps efforts.Sergey and I first heard about Android back in 2004, when Andy Rubin came to visit us at Google. He believed that aligning standards around an open-source operating system would drive innovation across the mobile industry. Most people thought he was nuts. But his insight immediately struck a chord because at the time it was extremely painful developing services for mobile devices.Rubin will remain with Google, heading up unspecified new products. Rubin, who spent several years at Apple as an engineer, co-founded Andr