Davion Mitchell isn’t officially part of Sacramento’s summer league squad, but the second-year guard has been highly involved since the team was assembled for the California Classic and Las Vegas Summer League. Mitchell can be found at practice and games, even sitting on the Sacramento bench between Kings owner Vivek Ranadive and the coaching staff. He’s in the locker room, in the huddle and in the hallways at Chase Center in San Francisco, where the unbeaten Kings will face the Los Angeles Lakers in the final game of the California Classic on Tuesday before heading to Las Vegas. Mitchell appr…