PHOENIX — If Christian Avila lived a few hundred miles to the west, he would have a driver’s license, qualify for in-state college tuition and a host of other opportunities available to young people granted legal status by President Barack Obama two years ago. But Avila lives in Phoenix, and the 24-year-old immigrant who was brought here from Mexico by his parents at age 9 still has to navigate the sprawling city in fear as he drives to school or work. “You get nervous, your legs start to tingle a …