shell/cmdmail: create instances with uno constructors

See tdf#74608 for motivation.

Change-Id: Ifeece1a72c594348f52e3edbee503a16a99619e6
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/98682
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

path: root/.gitmodules

[submodule "dictionaries"]
	path = dictionaries
	url = git://gerrit.libreoffice.org/dictionaries
	branch = .
[submodule "helpcontent2"]
	path = helpcontent2
	url = git://gerrit.libreoffice.org/help
	branch = .
[submodule "translations"]
	path = translations
	url = git://gerrit.libreoffice.org/translations
	branch = .