This was using the SfxPoolItem serialisation of XATTR_FILL* items,
where only XFillColorItem and XFillStyleItem were actually used;
the binary serialisation was removed without being aware of this
feature.

Fix this by using uno::Any instead, rather than reviving the binary
serialisation.

Also change the clipboard format strings, just to be safe.

(regression from 97b889b8)

Change-Id: I1828621a9aae606a1ca47835eef608062efe64a0
Reviewed-on: https://gerrit.libreoffice.org/62455Reviewed-by: Michael Stahl <Michael.Stahl@cib.de>
Tested-by: Michael Stahl <Michael.Stahl@cib.de>