fdo#54938 Convert dtrans, remoteb., reportd., ucbhelper to cppu::supportsSer..

Change-Id: I42cf7dc139b79b715f3c330f9bca7d333de8bafc
Reviewed-on: https://gerrit.libreoffice.org/7762
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
Tested-by: Stephan Bergmann <sbergman@redhat.com>