To my knowledge, there is no factory applied tint film available on any vehicle. If you do in fact have tint film, as I do, it is aftermarket stuff and Nissan would bear no responsibility for its durability. The light tint in the front two doors, as well as the darker tint everywhere else, is impregnated in the glass.
To be honest, nearly every vehicle I have owned has eventually developed scratches on the door glass, inside and out. Dust and grit inside those rubber seals is the culprit, and it's physically impossible to keep it out. Some, possibly all, of my vehicles had a padded guide inside the door structure, which also accumulated similar crap and scratched the glass, even without tint film.
Unfortunately, the only way to avoid the scratches is to never put down the windows.