Add album to mpris info

[matthiasheyman]

The album is not provided in the mpris info when running playerctl metadata (on linux). The player id is also chromium, instead of 'Saturn'

Version: 1.1.1

output:

$ playerctl metadata
chromium mpris:length              223320816
chromium mpris:trackid             '/org/chromium/MediaPlayer2/TrackList/Track6FB38F6DF2F24E2C627DF66B4F1F1008'
chromium xesam:artist              Tramhaus
chromium xesam:title               The Cause