Facebook Inc and Amazon.com Inc have asked the US government for approval to operate a new undersea data cable between the Philippines and California after China Mobile agreed to exit the plan, a government agency said Friday. The two companies told the Federal Communications Commission (FCC) they intend to start commercial operation by late 2022 and said the new data connection will provide significant new capacity on routes where capacity demand continues to increase substantially each year. The companies in a joint filing said the new cable will help to support Facebook applications and provide Amazon and its affiliates with…