Merge changes I085cb3cf,Ied1cddc6

* changes:
  MTP: Add support for syncing MTP playlists
  MTP: Fix some thread safety issues in MTP server start/stop sequence.
tree: 5be3669063d0b87cbf638c45b44b9d60b9a5ecd5
  1. camera/
  2. cmds/
  3. include/
  4. media/
  5. services/