SACRAMENTO, Calif. — The Kings made a move to address their lack of wing depth Friday, bringing in a young forward with size, length and athleticism. The Kings signed free agent KZ Okpala to a two-year contract, a league source told The Sacramento Bee, confirming a report from Chris Haynes of Yahoo Sports. Okpala, 23, is a 6-foot-8, 215-pound forward who came out of Stanford as the 32nd overall pick in the 2019 NBA draft. He spent his first three seasons with the Miami Heat, who acquired him in a draft day trade with the Phoenix Suns. Okpala is already familiar with Kings coach Mike Brown, ass…