Lloyd Braun, the thirty-nine-year-old president of Brillstein-Grey Entertainment, was intrigued when he got a call from Joe Roth inviting him to breakfast to discuss Disney’s troubled Touchstone TV studio. Brillstein-Grey had thrived in the year since Ovitz left Disney, producing “Just Shoot Me” and “NewsRadio” for NBC, and the late-night “Politically Incorrect” with Bill Maher for ABC. Braun, a lawyer and manager who numbered Cher and “Seinfeld” co-creator Larry David as clients, was probably best known as the character named Lloyd Braun whom David kept writing into “Seinfeld” plots.