Pontoon: Update Vietnamese (vi) localization of Test Pilot: Firefox Send
Pontoon: Update Vietnamese (vi) localization of Test Pilot: Firefox Send

Localization authors:
- hi <hi@duonganhtuan.com>
- Quế Tùng <best.cloney.1301@gmail.com>
- nguyễn việt anh <hatsune141p@gmail.com>

mozilla/send,mozilla/send,mozilla/send,mozilla/send,mozilla/send