Bugfix FXIOS-14345 [Tests] Use TestableUIToolbar for AccessoryViewProvider

[issammani]

📜 Tickets

Jira ticket
Github issue

💡 Description

This PR:

• Swaps UIToolbar for TestableUIToolbar in AccessoryViewProvider

🎥 Demos

Before	After

Demo

📝 Checklist

• I filled in the ticket numbers and a description of my work
• I updated the PR name to follow our PR naming guidelines
• I ensured unit tests pass and wrote tests for new code
• If working on UI, I checked and implemented accessibility (Dynamic Text and VoiceOver)
• If adding telemetry, I read the data stewardship requirements and will request a data review
• If adding or modifying strings, I read the guidelines and will request a string review from l10n
• If needed, I updated documentation and added comments to complex code

[issammani]

@clarmso can you trigger a run on the failing tests to see if this fixes it. I am pretty sure it's the same issue as #29114

[mobiletest-ci-bot]

	Messages
📖	Project coverage: 38.47%

💪 Quality guardian

1 tests files modified. You're a champion of test coverage! 🚀

🧹 Tidy commit

Just 2 file(s) touched. Thanks for keeping it clean and review-friendly!

✅ Per-file coverage

All changed files meet the threshold of 35.0%.

Client.app: Coverage: 37.28

File	Coverage
AccessoryViewProvider.swift	65.81%	✅

Generated by 🚫 Danger Swift against 79c0a05

[clarmso]

😞 I do not see the autofill on both iPhone 17 iOS 26.2 and iPhone 16 iOS 18.6.

[clarmso]

@issammani Please ensure autofill is available.