Austin Majors, who made his mark as a child star on the hugely successful "NYPD Blue" has died ... TMZ has learned. Austin died Saturday night while staying at a homeless housing facility in Los Angeles. A source with direct knowledge of the circumstances surrounding his death tells us there's no foul play suspected ... but it is believed he may have ingested a fatal amount of fentanyl. We're told an autopsy is set to be completed Monday, with final toxicology results expected in the next few months. Austin's family issued a statement on his death, telling us he, “Was...