Add FXIOS-10605 [ToS] Firefox iOS: Nimbus Flag for ToS

[dicarobinho]

:scroll: Tickets

Jira ticket

:bulb: Description

Added a nimbus flag for enabling/disabling Terms of Service feature

:pencil: Checklist

You have to check all boxes before merging

• [x] Filled in the above information (tickets numbers and description of your work)
• [x] Updated the PR name to follow our PR naming guidelines
• [ ] Wrote unit tests and/or ensured the tests suite is passing
• [ ] When working on UI, I checked and implemented accessibility (minimum Dynamic Text and VoiceOver)
• [ ] If needed, I updated documentation / comments for complex code and public methods
• [ ] If needed, added a backport comment (example @Mergifyio backport release/v120)

[mobiletest-ci-bot]

	Messages
:book:	Project coverage: 32.33%
:book:	Edited 3 files
:book:	Created 1 files

Client.app: Coverage: 31.13

File	Coverage
NimbusFlaggableFeature.swift	97.73%	✅
NimbusFeatureFlagLayer.swift	65.08%	✅

Generated by :no_entry_sign: Danger Swift against 0aaf187ccdc94e246f38a703df158b20b3f4e2fd