Feb. 4— OKLAHOMA CITY — As Andre Roberson walked into the press conference room, he touched the OKC Blue backdrop with his hand and looked at it with fondness. “A lot’s changed,” Roberson said with a smile. It certainly has. Saturday marked his first appearance at Paycom Center, formerly Chesapeake Energy Arena, in 1,836 days. The former Oklahoma City guard played from 2013-2020 with the…