Plans for a massive electric car factory on Mare Island near Vallejo have officially fallen through, as the company backing the idea, Faraday Future, officially ended talks with the city this week. The Vallejo City Council voted unanimously last May to give the electric car startup a six-month exclusive negotiating agreement for a 157-acre site on adjacent Mare Island, boosting the North Bay city seven years after it filed for bankruptcy. The site of Faraday's second assembly plant would be the…