LOS ANGELES — NBC is expanding its Red Nose Day programming with help from Julia Roberts and other. The network said that its schedule on May 25 will be devoted to the Comic Relief fundraiser for children. “Running Wild with Bear Grylls for Red Nose Day,” with Roberts joining the host in Africa, will air at 9 p.m. EDT. A celebrity edition of “American Ninja Warrior” with Derek Hough, Natalie Morales and others will precede it at 8 p.m. EDT.