Comment 14 for bug 1315386

AppArmor has rudimentary support for translations of xdg user dirs, but note, supporting translated directories on the phone has been ruled out because they are problematic for a whole bunch of reasons, instead the toolkit should handle these for the user rather than handling it in the filesystem.

So, we could've added this to write_path:
owner @{HOME}/Music/Imported/ r,
owner @{HOME}/Music/Imported/** rwk,

but as pointed out, we can't now. We could add the music_files policy group, which uses:
# Usage: reserved
owner @{HOME}/Music/ r,
owner @{HOME}/Music/** rwk,

but then that gets us back to the music-app having full access to all the music files which is one thing we were trying to avoid (we want a system where a 3rd party music app only needs to use the 'common' policy groups). This could be resolved by setting the import directory to ~/.local/share/com.ubuntu.music/imported and then have a symlink from @{HOME}/Music/Imported to ~/.local/share/com.ubuntu.music/imported. Something other than the music-app has to create the symlink.