Smoke rose from the backlot of Universal Studios on June 1, 2008, in Universal City, Calif.Credit...David McNew/Getty Images In 2013, Bryan Adams, the Canadian singer-songwriter, found himself facing a mystery. Twenty-nine years earlier, in 1984, Adams reached pop-rock superstardom with the release of his fourth LP, “Reckless,” which topped the Billboard 200 album chart and sold an estimated 12 mi