Revert the API change from e41c33b3
and use the existing css::util::XUpdatable instead.

Change-Id: I3eba4c7def98c8765a970d54a7fe84a320d4313e
Reviewed-on: https://gerrit.libreoffice.org/17382Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>
Tested-by: Markus Mohrhard <markus.mohrhard@googlemail.com>
(cherry picked from commit 41d1b01a)