fdo#54938 Convert toolkit to cppu::supportsService

Change-Id: I3a35a86d9ad9419011f0305fdc41c8484ae63a04
Reviewed-on: https://gerrit.libreoffice.org/7646
Tested-by: LibreOffice gerrit bot <gerrit@libreoffice.org>
Reviewed-by: Marcos Souza <marcos.souza.org@gmail.com>
Tested-by: Marcos Souza <marcos.souza.org@gmail.com>