Google is planning to "double down" on Android tablets in 2012, and take leadership away from Apple and the iPad, according to Google's senior VP for mobile, Andy Rubin. The executive spoke in a meeting with reporters yesterday at the ongoing Mobile World Congress show in Barcelona, Spain. He noted that 12 million in Android tablet sales is "not insignificant, but less than I'd expect it to be if you really want to win," adding that "2012 is going to be the year that we double down and make sure we're winning in that space."