EL SEGUNDO, Calif. — LeBron James is beginning his 22nd training camp this week with the Los Angeles Lakers, and this one will be a unique experience.The NBA’s career scoring leader is sharing a locker room and a court with Bronny James, his 19-year-old son and the Lakers’ second-round draft pick. They’ll soon become the first father and son in NBA history to play together, fulfilling an aspiration first expressed by LeBron several years ago.The 20-time All-Star didn’t downplay his excitement Monday to see one of his few remaining basketball dreams coming true.“There’s a lot of excitement,” LeBron said. “It’s pure joy, to be honest, to be able to come to work every day, put in the hard work with your son every day and be able to see him continue to grow. We push each other. He pushes me, I push him. We push our teammates. Just a very joyous moment, not only for myself, but for our family.”Father and son wore the Lakers’ gold uniforms together at the team’s media day, posing for innumerable photos and giving interviews that showcased the easy banter of family. Bronny’s new No. 9 jersey reads “JAMES JR.” on the back, in a nod to his full name, LeBron James Jr.Their partnership is a dream for the 39-year-old LeBron, but it’s been largely surreal for Bronny, wh …