Resolve "GNOME Software search provider wakes rpm-ostreed"

Closes #2435 (closed)

Please note it depends what search term is used in the GNOME Shell, because when an appstream plugin finds a match, it's passed to the rpm-ostree plugin to be refined, and even the app is hidden from the result at the end, it's not known whether the refine is for a search or for anything else, thus this cannot be optimized further without that information.

I checked it helps to not talk to the rpm-ostree daemon in several cases, only the Shell search case is not catch most often.