Andre Johnson was back, Mario Williams was solid and the Houston Texans got the win. Reggie Bush? An afterthought. Johnson had 120 yards receiving and a touchdown and Williams harassed Drew Brees all day to help the Texans to a 23-10 victory over the error-prone New Orleans Saints on Sunday. The Texans (5-5) scored 17 points before halftime and stayed on top with tough defense in the second half that…