Collect staged Android emulator logs

[sjchmiela]

Summary

• add eas/collect_emulator_logs to find staged emulator-native Logcat files under the fixed staging parent
• copy each file with its unique mkdtemp directory name into the destination directory
• run the collection step for Android Maestro function groups before uploading ~/.maestro/tests
• keep missing or unreadable staged logs non-fatal
• verify capture and collection with a real emulator across an ADB server restart

Why

Live logs stay under <buildLogsDirectory>/android-emulator-logcat while tests run. Each emulator start writes to <deviceName>-XXXXXX/logcat.log. The collection step scans that stable parent recursively and copies a snapshot into the Maestro artifact directory only when the workflow is ready to upload it. This avoids an artifact tar operation racing with the emulator-owned output file.

Test plan

• yarn workspace @expo/build-tools test --runInBand
• yarn workspace @expo/build-tools jest-integration src/steps/functions/__integration-tests__/collectEmulatorLogs.test.ts --runInBand
• yarn typecheck
• yarn lint
• yarn fmt:check

[linear]

ENG-20762 Stream Android emulator logcat from the emulator start

[codecov]

Codecov Report

❌ Patch coverage is 78.26087% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 62.61%. Comparing base (7903f38) to head (d94324e).

Files with missing lines	Patch %	Lines
...d-tools/src/steps/functions/collectEmulatorLogs.ts	75.61%	10 Missing ⚠️

Additional details and impacted files

@@                             Coverage Diff                             @@
##           stanley/eng-20762-stage-emulator-logcat    #3628      +/-   ##
===========================================================================
+ Coverage                                    62.55%   62.61%   +0.06%     
===========================================================================
  Files                                         1008     1009       +1     
  Lines                                        45827    45873      +46     
  Branches                                      9649     9653       +4     
===========================================================================
+ Hits                                         28664    28720      +56     
+ Misses                                       15705    15695      -10     
  Partials                                      1458     1458              

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[github-actions]

⏩ The changelog entry check has been skipped since the "no changelog" label is present.

[sjchmiela]

Superseded by #4164 and the updated #3627. Emulator logs are now uploaded as a separate artifact, so the collect-emulator-logs function and PR are no longer needed.