SEATTLE — Starbucks chief executive Howard Schultz said Thursday the company might close its bathrooms to people who are not customers, reversing a 2018 policy. Schultz cited safety as the reason for the reversal of the open-bathrooms policy, which came into being after an incident at a Philadelphia Starbucks that drew racial bias accusations. “We have to harden our stores and provide safety for our people,” Schultz said Thursday during The New York Times’ Dealbook D.C.