Let test::AccessibleTestBase::getWindowAccessible return an OAccessible and drop test::AccessibleTestBase::getWindowAccessibleContext, as OAccessible implements the XAccessibleContext interface as well. Change-Id: I50308897a1539521f09fae0b13a56813077c7cc4 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/188635 Tested-by: Jenkins Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>