Rewrite AutocryptHeaderParser and AutocryptGossipHeaderParser in Kotlin

[shamim-emon]

• Fixes Rewrite AutocryptHeaderParser and AutocryptGossipHeaderParser in Kotlin #9830

Summary

This pull request refactors the AutocryptHeaderParser and AutocryptGossipHeaderParser classes from Java to Kotlin. The conversion enhances code readability, maintains existing functionality, and aligns with Kotlin best practices.

Key Changes:

• Kotlin Conversion: Both classes have been rewritten in Kotlin, leveraging Kotlin's features for cleaner and more concise code.
• Logging Enhancements: Introduced consistent logging mechanisms to improve traceability and debugging.
• Functionality Preservation: All existing functionalities and behaviors have been preserved to ensure no regressions.
• Code Quality Improvements: Refactored code to adhere to Kotlin coding standards, improving maintainability and readability.