SANTA ANA, Calif.—A 28-year-old man was convicted Monday of a speeding death that killed a driver in Mission Viejo five years ago. Jurors deliberated for about 90 minutes before convicting Afiff Kevin Doaifi of second-degree murder in the March 25, 2017, death of 33-year-old Judith Noval. Doaifi, who is scheduled to be sentenced Dec. 13,…