Idrinth / habit-evaluator / 22075923050

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Fix Maestro coverage collection: bundle JaCoCo agent and use internal storage (#437)

The download-artifact step found 0 artifacts matching maestro-coverage-*
because the .ec files were never produced. Two root causes:

1. The JaCoCo agent runtime (org.jacoco.agent.rt.RT) was only bundled in
   the androidTest APK, not the main debug APK. The broadcast receiver's
   Class.forName() call threw ClassNotFoundException silently, producing
   no coverage file. Fixed by adding debugImplementation dependency on
   org.jacoco:org.jacoco.agent:0.8.11:runtime.

2. On API 30+ (Android 11), scoped storage restricts adb pull from
   /sdcard/Android/data/<package>/files/. Switched to writing coverage
   data to internal storage (getFilesDir()) and retrieving it via
   adb exec-out run-as, which works reliably on debuggable builds.

https://claude.ai/code/session_014CRE6kvZVyFDazdxLfrU4d

Co-authored-by: Claude <noreply@anthropic.com>

2782 of 7082 branches covered (39.28%)

Branch coverage included in aggregate %.

9426 of 20288 relevant lines covered (46.46%)

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