LAS VEGAS — O.J. Simpson, the football star and Hollywood actor acquitted of charges he killed his former wife and her friend in a trial that mesmerized the public and exposed divisions on race and policing in America, has died. He was 76.The family announced on Simpson’s official X account that he died Wednesday of prostate cancer. He died in Las Vegas, officials there said Thursday.Simpson earned fame, fortune and adulation through football and show business, but his legacy was forever changed by the June …