DALI, China — Justin Franchi Solondz, an environmental activist from New Jersey who spent four years evading charges of ecoterrorism in the United States by hiding out in this backpacker haven, was convicted by a Chinese court on Friday of manufacturing drugs. After serving a three-year sentence, Mr. Solondz, 30, who is on the F.B.I.’s most wanted list, will be deported to the United States, where he faces charges stemming from what the authorities say was his role in an arson rampage that destroyed buildings in three western states as a member of a group related to the environmental extremist...