SAN FRANCISCO (AP) — After nearly a decade in legal wrangling, a billion-dollar class-action lawsuit over Apple’s iPod music players heads to trial on Tuesday in a California federal court. A key witness will be none other than the company’s legendary late founder Steve Jobs, who will be heard in a videotaped deposition. Attorneys for consumers and electronics retailers claim Apple Inc. used software in its iTunes store that forced would-be song buyers to use iPods instead of cheaper music players made by rivals.