By Douglas Gillison and David Shepardson WASHINGTON (Reuters) -President Joe Biden on Wednesday unveiled fresh efforts to slash credit card late fees and drive down the prices that Apple Inc and Google parent Alphabet Inc charge on mobile app stores. The move is part of a larger policy drive to promote competition in consumer markets, officials said. Speaking at the White House, Biden also called on lawmakers to ban “junk fees” he said jacked up costs for consumer services such as accommodation, concert tickets, mobile plans and air travel, in which officials said air carriers can charge famil…