fix fdo#40073 : look for translated frame styles

LO was looking for untranslated frame styles,
while at this step, the style list contains only the
translated ones.

Change-Id: I36173fc871582f974184fc95bb4d1a82cd3de783
Reviewed-on: https://gerrit.libreoffice.org/9683
Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>