[gnome-music] (13 commits) Non-fast-forward update to branch wip/jfelder/mpris-cleanup

[Jean Felder <jfelder src gnome org>]

The branch 'wip/jfelder/mpris-cleanup' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  713f318... mpris: Do not send PlaybackStatus property if unchanged
  4168394... mpris: Change naming convention to snake_case
  183794b... mpris: Move dbus connection logic to DBusInterface
  ccb069c... mpris: Handle signals emissions internally
  f43f8c2... mpris: Make app attribute internal
  04dd5f7... mpris: Make player attribute internal
  9a9524d... mpris: Make player_toolbar attribute internal
  8422e15... mpris: Update copyright information
  dab5ccb... mpris: Fix some PEP-8 issues
  0483a93... CI: Remove mpris.py from flake8 ignored files
  69d813a... grilo playlist

Commits added to the branch:

  86aa5df... mpris: Distinguish mpris playlists from user playlists
  264a3ad... mpris: Simplify GetPlaylists method
  be6b7d1... mpris: Do not send PlaybackStatus property if unchanged
  5c7ef39... mpris: Change naming convention to snake_case
  28c3d53... mpris: Move dbus connection logic to DBusInterface
  a6feb79... mpris: Handle signals emissions internally
  22b30e3... mpris: Make playlists attribute internal
  b9d69c7... mpris: Make app attribute internal
  debe6fd... mpris: Make player attribute internal
  e775f71... mpris: Make player_toolbar attribute internal
  c3e09dc... mpris: Fix some PEP-8 issues
  44fdd37... CI: Remove mpris.py from flake8 ignored files
  de6c8c9... mpris: Update copyright information