Move Sound Recorder to Extras
After discussing with Sound Recorder's maintainer @bilelmoussaoui about UI freeze, they told me Sound Recorder is not a core application and they don't follow the GNOME release cycle schedule.
A quick look at the list of core apps tells us that actually, Sound Recorder indeed is not a Core application.
I think we should move it to Extras so translators don't have extra work during the string freeze period.
@bilelmoussaoui, @afranke, thoughts?