Please refer to the FAQ at https://www.odoo.sh/faq#install_dependencies and the documentation at https://www.odoo.com/documentation/14.0/administration/odoo_sh/getting_started/first_module.html#use-an-external-python-library

There is no way to install apt dependency via odoo module
you have to request odoo ( https://www.odoo.sh/feedback ) for add apt dependency 

ref: https://www.odoo.com/documentation/user/13.0/odoo_sh/advanced/containers.html 
"The Odoo.sh team is open to install any system packages as long as they are distributed in the official Ubuntu repositories. Leave us a feedback if you would like a package not yet installed."

You simply define that library name in your module manifest external_dependencies.
Example:

'external_dependencies': {
        'python': ['Crypto','ringcentral'],
    },