A California Assembly panel has given preliminary approval to raising the statewide minimum wage to $15 an hour by 2022. Members of the Assembly Appropriations Committee voted Wednesday to advance the agreement between Democratic Gov. Jerry Brown and labor unions. The measure now goes to the full Assembly.  Supporters say the raises would benefit more than 2 million Californians earning minimum wage. Business owners and some economists are concerned it would prompt layoffs and cause price increases that would outweigh the benefits.