[codex] Improve Maven package descriptions

[rz-openai]

Summary

• read Maven POM descriptions from each Android module's Gradle metadata
• add concise, artifact-specific descriptions for the shared, OkHttp, HttpURLConnection, and release no-op packages

Why

All five Maven Central artifacts currently use the same generic description, which makes their distinct purposes unclear. Per-module descriptions make the package listings easier to understand and maintain.

Impact

Future published versions will show descriptions specific to each artifact. Runtime behavior is unchanged.

Validation

• ./gradlew assemble generatePomFileForMavenPublication
• inspected the generated POM descriptions for all five published modules

[rz-openai]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. 🚀

Reviewed commit: ddda49ba2f

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