CLEVELAND — Joel Embiid says his life is like a movie. It’s a movie with a main character who hails from Cameroon. He didn’t take up basketball until the age of 16, then moved to America to hone his skills only to consider walking away from the sport. But after staying the course, he becomes a five-time NBA All-Star starter and the face of the 76ers franchise. “It’s amazing,” Embiid, who turns 28 next month, said after finishing with 36 points and 10 rebounds in Sunday night’s NBA All-Star Game. “I always said it, everything just happens so fast. Year after year. If you want to grow through th…