[build-tools] Enable simulator accessibility prefs before boot

[sjchmiela]

Summary

• Add an opt-in enable_accessibility_settings boolean input to eas/start_ios_simulator.
• When enabled, call IosSimulatorUtils.enableAccessibilitySettingsAsync inline immediately before each IosSimulatorUtils.startAsync call, including cloned simulators.
• Reuse the existing xcrun simctl list devices --json --no-escape-slashes available wrapper so the dataPath from simctl JSON is used directly, then do an exact UDID/name equality check in JS. This avoids simctl search-term substring matches like iPhone 17 matching iPhone 17 Pro.
• Treat invalid requested simulator state as UserError; wrap command/filesystem setup failures as SystemError.

Why

These accessibility preferences help Argent and other AX-tree based tools inspect Simulator state more reliably. They can influence app/runtime accessibility behavior, so the setting is explicit and default-off rather than applied to every simulator startup.

Maestro compatibility

enable_accessibility_settings defaults to false, so existing Maestro test runs and other eas/start_ios_simulator users keep the previous startup behavior unless they opt in. When enabled, the setup only writes preferences for an exact, available, shutdown simulator before simctl bootstatus -b. If the requested simulator is not available or not shutdown, the step fails with UserError; if the setup command/filesystem work fails, it fails with SystemError.

Notes

• plutil is a standard macOS utility (/usr/bin/plutil on the local validation machine), so this does not add an external tool installation requirement.

Validation

CI should pass.

[codecov]

Codecov Report

❌ Patch coverage is 96.55172% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 59.12%. Comparing base (85a4054) to head (207f922).

Files with missing lines	Patch %	Lines
...ackages/build-tools/src/utils/IosSimulatorUtils.ts	95.84%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3914      +/-   ##
==========================================
+ Coverage   59.05%   59.12%   +0.07%     
==========================================
  Files         935      935              
  Lines       40954    40983      +29     
  Branches     8621     8629       +8     
==========================================
+ Hits        24181    24226      +45     
+ Misses      16678    16662      -16     
  Partials       95       95              

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