By Chris Rosvoglou On Friday night, former All-Pro defensive end J.J. Watt advocated for one particular coaching candidate to land a promotion this offseason. Watt responded to a report that said 49ers defensive coordinator DeMeco Ryans completed an interview with the Texans for their head-coaching vacancy. Ryans and Watt were teammates in Houston for the 2011 season. At that time, Watt was just a rookie. It’s pretty evident that Watt thinks the world of Ryans, and for that reason, he’d like to see the defensive coordinator get a chance to lead an NFL team. “As rookie in Houston, I bought my f…