Epic Games expanded its antitrust legal fight with Google by accusing the tech giant of conspiring with Samsung Electronics Co. to block rival app marketplaces. Epic Games Inc. expanded its antitrust legal fight with Alphabet Inc.’s Google by accusing the tech giant of conspiring with Samsung Electronics Co. to block rival app marketplaces through default settings on mobile devices sold all over the world. Epic, maker of the video game “Fortnite,” won a jury trial last year over claims that...