CHARLOTTE, N.C. — The Lakers signed a 20-year agreement with cable giant Time Warner starting with the 2012-13 season, the team announced today. They will leave their longtime homes with Channel 9 and Fox Sports Net. Time Warner will launch two new regional sports networks in HD to showcase Lakers games. You won’t have to have Time Warner as your cable company to get the new channels, however. They will be available on other cable and satellite outlets.