By Steve Holland and Pavel Polityuk WASHINGTON/LVIV, Ukraine (Reuters) – A U.S. ban on imports of Russia’s oil ratcheted up punishment for the invasion of Ukraine on Tuesday as McDonald’s and Starbucks closed outlets and Moscow promised safe passage for some to flee after Kyiv said one route was shelled. As the number of refugees created by the biggest assault on a European country since World War Two surpassed 2 million, several of the most internationally famous brands added to the Kremlin’s global isolation on the 13th day of the incursion. McDonald’s, a symbol of capitalism that opened in …