BALTIMORE — As an undergraduate at Bowie State University, Vernon Brownlee kept the idea of attending law school in the back of his mind, even though the high cost of tuition threatened to stand in his way. “I was interested, but it seemed more like a dream than a reality,” said Brownlee, now a second-year student at the University of Baltimore School of Law. But as part of a program aimed at preparing students from Maryland’s four historically black colleges and universities, or HBCUs, for …