RIDGEFIELD — Whether Alicia Andrew goes up for a lay-in, snags a rebound, or rejects a shot in the paint, her 6-foot-3 1/2 frame sets the sophomore apart. So does titanium. Andrew, the starting center on Ridgefield’s girls basketball team, is bolstered by two titanium rods nearly a foot-and-a-half long to correct the effects of scoliosis, a horizontal curvature of the spine.