fdo#86664 VSDX: import metadata

Only title as a start.

Change-Id: Id1b92992c75058f99b9c0c72d53c254110917ed7
Reviewed-on: https://gerrit.libreoffice.org/13108
Reviewed-by: Fridrich Strba <fridrich@documentfoundation.org>
Tested-by: Fridrich Strba <fridrich@documentfoundation.org>