fdo#77267 RTF import: pard should reset current paragraph style

Change-Id: I8d78ce262a4e57161325231a78e48750909b1bad
(cherry picked from commit 904630a2272ac4dd540939f8a462bff5d636f066)
Reviewed-on: https://gerrit.libreoffice.org/9055
Tested-by: Michael Stahl <mstahl@redhat.com>
Reviewed-by: Michael Stahl <mstahl@redhat.com>