Rupert Murdoch’s 21st Century Fox has been engaged in talks to sell its movie and television production studios to Walt Disney Co., according to a person familiar with the matter who was not authorized to comment on the discussions.CNBC reported that Murdoch’s media company might be interested in unloading many of its Los Angeles-based entertainment properties.Fox News would not be part of any sale, one person familiar with the talks said.Such a sale would make Disney a more formidable media conglomerate at a time when AT&T is trying to swallow Time Warner Inc., owner of CNN and HBO, and technology companies are creating original content.