Bugfix FXIOS-14407 Disable Apple Intelligence from macOS Tahoe during XCUITests

[clarmso]

📜 Tickets

Jira ticket

💡 Description

Cyndi and I confirmed in a hack session that macOS Tahoe makes Apple Intelligence available to the iOS 26.x simulators, but earlier macOS versions does not. My computer has macOS Tahoe installed. This discrepancy causes the tests (Example: ReadingLists) may touch apple intelligence to pass on CI/CD but fails on my computer.

As a workaround, we may disable Apple Intelligence just for XCUITests. Please let me know if there's a better workaround.

Code to reproduce the behaviour: 📜 icon on URL bar for reader mode vs ⚡ icon for shake to summarize

    func testDummy() throws {
        addLaunchArgument(jsonFileName: "defaultEnabledOff", featureName: "apple-summarizer-feature")
        addLaunchArgument(jsonFileName: "defaultEnabledOff", featureName: "hosted-summarizer-feature")
        app.launch()
        navigator.openURL("https://www.mozilla.org")
   }

🎥 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

[mobiletest-ci-bot]

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📖	Project coverage: 38.17%

🧹 Tidy commit

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💬 Description craftsman

Great PR description! Reviewers salute you 🫡

✅ Per-file coverage

All changed files meet the threshold of 35.0%.

Client.app: Coverage: 37.11

File	Coverage
AppleIntelligenceUtil.swift	93.55%	✅

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