In case the videocall_location was a relative URL, the link wouldn't work
properly. This commit fixes this by converting all URLs to absolute
automatically. Note that this only works for http and https protocols. If
using proprietary schemes such as :skype is desired, this implementation
should be done in the respective module.
X-original-commit: 16fb60e193d0c79333d95ef2f31f0ec01830571f
Part-of: odoo/odoo#117214