In December, a federal jury in San Francisco found that Google had violated antitrust law by imposing high fees and stringent rules on Epic Games and other app developers in Google’s app store. On Monday, Judge James Donato of the U.S. District Court for the Northern District of California ordered Google to make a series of changes to address its anticompetitive conduct. For three years starting Nov. 1, the company must allow developers to bring their own app stores to the Android mobile operating system.