The Oakland City Council has given Oakland its own official cocktail — shaken, on ice. The Mai Tai.  Vice Mayor Rebecca Kaplan, who introduced the resolution at Tuesday’s meeting, said the council’s move honors the city’s history as a center of entertainment, culture, arts, food and drink.  “Honoring and supporting our innovators helps expand our economy, jobs, opportunity, revenue, and uplifts the community,” Kaplan said. According to the resolution,  the Mai Tai was invented by Victor J. “Trader Vic” Bergeron,…