tracker-extract: Add nmm:Playlist to the list of handled classes
tracker-extract: Add nmm:Playlist to the list of handled classes

This class has tracker:notify true, but tracker-extract happened to ignore
it...

outofbits/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker