New Washington coach Jedd Fisch entered the weekend with exactly one scholarship quarterback: four-star early enrollee freshman Dermaricus Davis. That’s not nearly enough. So Fisch added another. Demond Williams Jr. — a four-star early enrollee freshman from Chandler, Ariz. — announced a commitment Sunday, while completing an official visit in Seattle. He had previously signed to play for Fisch and new UW quarterbacks coach and passing game coordinator Jimmie Dougherty at Arizona, but was released from his national letter of intent. UW also received a commitment on Sunday morning from redshirt…