NEW YORK — His broadcasting career has yet to begin but Tom Brady is already the most visible NFL TV analyst in the business. Through the sheer buzz he’s generating, the Hall of Fame-destined quarterback is already paying dividends on the $375 million Fox Sports will invest in him over 10 years. After his Tuesday ESPN interview with Pat McAfee, where Brady revealed he is already preparing for the gig (he told McAfee practice sessions with play-by-play man Kevin Burkhardt had taken place in Fox’s Hollywood compound), the hills were alive with the sounds of social media pundits and Valley of the…