Four years ago Kevin Mandia agreed to sell his cybersecurity company Mandiant to Google for $5.4 billion . Now he's back in the game, with Google's help. On Tuesday, Mandia's new startup, Armadin, said it raised nearly $190 million, in a funding round led by Accel. Google Ventures is participating, along with firms including Kleiner Perkins, Menlo Ventures and Ballistic Ventures, which Mandia co-founded. Mandia told CNBC in an interview that the emergence of artificial intelligence,