Fix/patrol cli windows hang bundle

[zoskar]

Summary

Two Windows-specific fixes in patrol_cli's shared Android build path (affects patrol test, patrol build, patrol develop, and MCP run):

• Hang at gradlew :app:dependencies — detectOrchestratorVersion listened only to stdout, so gradle's stderr filled the OS pipe buffer and the process blocked forever. Now drains stderr too. Fixes Can't launch test, stuck on gradlew dependencies #2565.
• Garbled generated test_bundle.dart — _normalizeTestPath used a literal prefix strip that broke when the test target used forward slashes (patrol develop/MCP) or a .\ prefix (PowerShell tab-completion), leaking an absolute-path import. Now resolves the path with path.relative. Fixes Generated test bundle is broken on Patrol 2.0 on Windows #1428.

[gemini-code-assist]

Code Review

This pull request introduces several fixes for Windows compatibility in patrol_cli and patrol_mcp, including avoiding SIGTERM listeners on Windows to prevent SignalException crashes, draining the Gradle stderr stream to prevent hanging, and improving test path normalization. Feedback was provided regarding a potential runtime crash in test_bundler.dart if _projectRoot is a relative directory, suggesting the use of _projectRoot.absolute.path to ensure both paths are absolute.

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[gemini-code-assist]

If _projectRoot is a relative directory (e.g., Directory('.')), _projectRoot.path will be relative. In this case, fileAbs will also be resolved as a relative path. Since testDirAbs is always absolute (using .absolute.path), passing a relative fileAbs and an absolute testDirAbs to _fs.path.relative will throw an ArgumentError at runtime (as the path package requires both paths to be either relative or absolute).

To prevent this potential runtime crash, use _projectRoot.absolute.path to ensure fileAbs is always resolved as an absolute path.

Suggested change

	final fileAbs = _fs.path.isAbsolute(testFilePath)
	? _fs.path.normalize(testFilePath)
	: _fs.path.normalize(_fs.path.join(_projectRoot.path, testFilePath));
	final fileAbs = _fs.path.isAbsolute(testFilePath)
	? _fs.path.normalize(testFilePath)
	: _fs.path.normalize(_fs.path.join(_projectRoot.absolute.path, testFilePath));