By Jeff Mason, David Brunnstrom and Michael Martina WASHINGTON (Reuters) -U.S. President Joe Biden said on Friday a first summit in Washington with leaders from the Association of Southeast Asian Nations (ASEAN) marked the launch of a “new era” in the relationship between the United States and the 10-nation bloc. Addressing the second day of a two-day meeting, Biden said “a great deal of history of our world in the next 50 years is going to be written in the ASEAN countries, and our relationship with you is the future, in the coming years and decades.” The summit marks the first time that ASEA…