WASHINGTON — A federal judge approved the $85 billion mega-merger of AT&T and Time Warner on Tuesday, a move that could usher in a wave of media consolidation while shaping how much consumers pay for streaming TV and movies.U.S. District Judge Richard Leon green-lit the merger without adding major conditions to the deal. The Trump Justice Department had sued to block the $85 billion merger, arguing that it would hurt competition in cable and satellite TV and jack up costs to consumers for streaming TV and movies.Now, the phone and pay-TV giant will be allowed to absorb the owner of CNN, HBO, the Warner Bros. movie studio, “Game of Thrones,” coveted sports programming and other “must-see” shows. The Justice Department could decide to appeal the ruling, however.“The impact from this decision will have wide reaching ramifications across the telecommunications, media, and tech industry for decades to come,” said GBH Insights analyst Dan Ives. “For AT&T and Time Warner, this is a major victory lap.”The mega-merger was a high-stakes bet by AT&T Inc. on combining a company that produces news and entertainment with one that funnels it to consumers. The merged company, executives said, would be better able to compete in an era in which people spend more time watching video on phones and tablets and less time on traditional live TV on a big screen.