UPSTREAM PR #2001: Switch to std::string::data() in Utf16ToUtf8 (C++17)

[loci-dev]

Mirrored from abseil/abseil-cpp#2001

[loci-agentic-ai]

Based on the analysis results, no functions were identified with meaningful performance changes between the base and target versions. The function insights for both response time and throughput time returned empty results, indicating that the code modifications did not produce significant performance impacts.

This suggests that the changes between versions were either non-performance-affecting (such as documentation updates, minor refactoring, or bug fixes that don't alter execution paths), or the modifications were too minimal to register measurable differences in execution time metrics.

Conclusion: No meaningful performance changes occurred between the analyzed versions.

See the complete breakdown in Version Insights
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