Android is most definitely on the upward march when it comes to the world stage. But you might be surprised at how it's faring in the US: it's down, according to Strategy Analytics' estimates. As of the second quarter, Google's market share dropped from 60.6 percent a year earlier to 56.3 percent. No one would call it a moment of crisis for Android, but it implies that Apple was drawing in more of the customers jumping ship from other platforms --