Look for (or hide from) more debates about the iPhone and Android devices. Even as Apple fans prepare for all the hoopla surrounding another iPhone launch, it seems that Android's achieved another victory, with Quantcast putting its U.S. market share up by a significant amount for May. Android ended May with a market share of 19.9 percent, according to the audience research firm, which means it achieved a month-over-month increase of 1.3 percent. Quarter-over-quarter,