As we’ve noted before, Ben Simmons is big into real estate and now that taste has extended to Brooklyn. After unloading a manse in Moorestown, N.J. and trying to sell another in the Hidden Hills of L.A. as well as a condo in Center City, Philly, Simmons reportedly is in contract for a $13 million residence in The Olympia in DUMBO. It’s a new 33-story luxury tower at 30 Front St., Brooklyn, just across the East River from ESPN’s studios on Pier 17 … essentially shouting distance from Stephen A. Smith’s booming rants. The New York Post’s Gimme Shelter column…