The music-app uses contentItem.move(dir, filename) to move files into ~/Music/Imported however while trying to add confinement back into the app it has been noted that this method does not function as expected. Any folders are created but the actual file is not renamed.
There is an example branch of the music-app under confinement here [0].
Note you may need to add the following to the apparmor profile (/var/lib/apparmor/profiles/click_com.ubuntu.music_music_1.3.634), depending which version of apparmor you are using and rerun the parser for that profile:
dbus (receive) bus=session peer=(label=/usr/bin/mediascanner-service-2.0),
dbus (bind) name="org.freedesktop.Application",
0 - https://code.launchpad.net/~andrew-hayzen/+junk/music-app-confinement-001
This is the application log for music while trying to move the file [0] and the mediascanner log [1].
0 - http://
1 - http://