NEW YORK — Seventy years ago on Friday, no one outside of the U.S. Supreme Court building heard it when Chief Justice Earl Warren announced the historic Brown v. Board of Education decision on school desegregation.Now, through the use of an innovative voice-cloning technology, it is becoming possible for people to “hear” Warren read the decision as he did on May 17, 1954, along with oral arguments by lawyers including a future Supreme Court justice, Thurgood Marshall.The “Brown Revisited&rdquo …