Make it use cppu::WeakComponentImplHelper, because all its derived
classes used that template. In the derived classes, switch to use
of cppu::ImplInheritanceHelper. That simplifies the hierarchy, and
doesn't require to re-implement many basic methods.
Change-Id: I40ec05a471af4437098586d20540f9a815677952
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/173370
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
Tested-by: Jenkins