OK I see, to be honest I guessed the previous interpretation of why this was there when I made this change, based on DCIM being a folder for images, not audio. I thought it unlikely that an audio file would be in DCIM folder except in the case that we explicitly push it there. With the rest of the changes in this pull we would not push to this folder anymore.
I can just remove this condition altogether, which would cause 3gp files to be counted twice (although correctly as 3gp can be music or video)  when we call the `media_files` property, but then adjust the assertion of the unittest to match.