DT-751: Fix autostart (core22)
requested to merge sergio-costas/gnome-software:DT-751-fix-autostart-in-snap-store into snap-store-41-core22
The autostart is enabled only when the "ubuntu-software" app from the "snap-store" snap is run, but not if the "snap-store" app is run. This was quite hidden because the icon in the dock is for the "ubuntu-software" app.
This PR fixes this by setting the autostart for both apps.