Pontoon: Update Arabic (ar) localization of Test Pilot: Firefox Send
Pontoon: Update Arabic (ar) localization of Test Pilot: Firefox Send

Localization authors:
- Abdalrahman Hwoij <howij1995@gmail.com>
- صفا الفليج <safa1996alfulaij@gmail.com>

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