CLEVELAND — Joel Embiid arrived at All-Star Weekend at the top of the race for the NBA’s Most Valuable Player award. And when asked to make his case at Saturday’s Media Day, the 76ers’ center said “the way I’ve been playing speaks for itself.” “Especially with everything we went through,” Embiid said, “the drama this whole year, and obviously missing a big piece [Ben Simmons] … I really had to take my game to another level, whether it’s offensively, defensively or playmaking.” Embiid entered the All-Star break leading the league in scoring at 29.6 points per game — a rarity for a center — whil…