Alphabet Inc.’s Google is in final talks to acquire AdHawk Microsystems Inc., a maker of eye-tracking technology, part of a renewed push into headsets and smart glasses.The technology giant intends to buy the Canadian startup for $115 million, according to people with knowledge of the matter. That includes $15 million in future payments that will hinge on AdHawk reaching performance targets, said the people, who asked not to be identified because the deal hasn’t been announced....