Use comphelper::sequenceToContainer instead of ContainerHelper::SequenceToVector

Change-Id: I4834255a1349ac7a29127a84a54fcfa98d678d00
Reviewed-on: https://gerrit.libreoffice.org/72186
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>