Allow Oneshot Router Return in 4G Vodafone

CHANGELOG:

### ADDED
- [#774](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/774) Allow Oneshot Router Return in 4G Vodafone

Related card: https://trello.com/c/xYInk1yj/1219-habilitar-oneshot-chscosoreturnrouter-per-contractes-router-4g-i-provider-vodafone

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