When Kelvin Jones crossed bridges and bays last week to reach Apple headquarters and claim his medal, it was one of the farthest trips he’s ever taken from Vallejo.In a way, the trip was symbolic of the long journey the 17-year-old Vallejo man took from being just another kid in juvenile hall to a young man on track to graduate early — and who was last week named Youth of the Year for the Continentals of Omega Boys and Girls Club.