Google on Wednesday unveiled a new line-up of Pixel smartphones injected with another dose of artificial intelligence that's designed to do everything from fetch vital information stored on the devices to help improve photos as they're being taken. The AI expansion on the four Pixel 10 models amplifies Google's efforts to broaden the use of a technology that is already starting to reshape society. At the same time, Google is taking a swipe at Apple's Achilles' heel on the iPhone. Stream NBC10 Boston news for free, 24/7, wherever you are. WATCH HERE WATCH HERE Apple so far has only been…