NEW YORK — Bronx-born rapper Cardi B pleaded guilty on Thursday and was sentenced to community service for her role in a bottle-throwing attack at a strip club in Queens. The deal allows the hip-hop star to avoid jail time — and gave the flashy performer to show off yet another ensemble on the Queens courthouse steps. Cardi B, whose real name is Belcalis Almanzar, pleaded guilty to misdemeanor counts of assault and reckless endangerment, and agreed to 15 days of community service. If she fails to complete the service, she will have to serve 15 days in jail. “Part of growing up and maturing is …