A New Jersey man has been charged with attempting to lure children for sex on social media app, authorities said. Brian Stewart, of Clifton, posed as “Brian Being Brian” on Kik, a popular instant messaging application and attempted to lure two children to Boonton Township for sex, the Morris County Prosecutor’s Office said Wednesday. Stewart, 41, is charged with luring, attempted aggravated sexual assault, attempted endangering the welfare of a child, and endangering the welfare of a child, prosecutors said. Stewart was arrested and brought to the county’s jail. Attorney information for Stewar…