UpdateParameters: move things out of SetParametersData
UpdateParameters: move things out of SetParametersData

This struct makes it much harder to see which functions actually use
which data, and I think we leak some of it on some code paths. So I'm
gonna get rid of it, piece by piece.

freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control