Fix a regression when doing GetReleases on unsupported hardware
Fix a regression when doing GetReleases on unsupported hardware

With an indexed string we can return INVALID_ARGUMENT before the query actually
runs if nothing matches.

hughsie/fwupd,hughsie/fwupd,fwupd/fwupd,fwupd/fwupd,hughsie/fwupd,fwupd/fwupd,vathpela/fwupd,fwupd/fwupd,hughsie/fwupd,vathpela/fwupd,vathpela/fwupd,vathpela/fwupd