“Though workers in restaurants and grocery stores face risks while providing a similarly essential service of making food available to customers, it is reasonable for the City to view the work of food delivery network drivers as serving a different, additional purpose of minimizing person-to-person contact in otherwise highly trafficked areas; it is likewise reasonable for the [c]ity to choose to incentivize that work by requiring premium pay,” Justice Raquel Montoya-Lewis wrote in the lead opinion.