#3784 Added javadocs & sources to Gradle's metadata.

[AlexanderBartash]

📜 Description

See #3784

💡 Motivation and Context

I like having sources.

💚 How did you test it?

I did not because I could not even run basic Gradle tasks in this project.

📝 Checklist

• [ x] I reviewed the submitted code.
• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• Review from the native team if needed.
• [x ] No breaking change or entry added to the changelog.
• [x ] No breaking change for hybrid SDKs or communicated to hybrid SDKs.

🔮 Next steps