This is the Android M Easter Egg ¯\_(ツ)_/¯
Haha, Google, so silly. Yes, my friends, that really is your Android M Easter Egg - for the moment. Edit: For those who are finding the "M" hidden as well, we are well aware of it. Tap on it a few times, then long press and you'll get the shruggy face. ¯\_(ツ...