Into a single OComponentResultSet, as both of them just provide data
source functionality based on a file loaded into an LO component, so
they can share code.

Change-Id: I19352e592a45d7a58d834e72645dec72d77ce7c9
Reviewed-on: https://gerrit.libreoffice.org/40180Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>