ST. LOUIS COUNTY — The police department here is on track to become just the second in the U.S. to provide its officers with subsidized child care, part of an effort to attract and retain officers — especially women. The St. Louis County Police Department’s goal is to open its day care center by the fall of 2024. If it does, it will join San Diego as the only other police department in the country to offer partially funded child care with flexible hours and drop-off availability. “You know, it’s exciting,” said Matt Crecelius, business manager for the St. Louis County Police Association, which…