Jayden Maiava spoke publicly for the first time since being elevated from backup to USC’s starting quarterback with the Trojans having lost four of their past five games and sitting at 4-5 overall this season. The move comes during USC’s bye week and Maiava will have two full weeks to get ready for the Trojans’ homecoming game against the Nebraska Cornhuskers. “Let’s practice,” Maiva said of his first thoughts after being told of the change. “Let’s just go out there and start getting reps in.” Maiava arrived at USC in time for spring practice and was earning a share of the reps then and during…