Apple’s iOS and Google’s Android now account for over 80 percent of the U.S. smartphone market, according to the latest data from comScore. While Android continues to lead iOS with a 50.1 percent share of the market, iOS has seen continued growth, accounting for 30.2 percent of the market in February—up from 28.7 percent in November 2011, and up five percentage points from a year ago. iOS’ and Android’s growth has come…