Convert ClipboardMessage class from Kotlin to Java

[TheMeinerLP]

Proposed changes

ClipboardMessage class has been migrated from Kotlin to Java corresponding changes were made to the SyncService class. The code uses TypedJsonJacksonCodec instead of JsonJacksonCodec and direct getter methods were used for extracting userId and fromServer data from the message. The uncaught exceptions also now handled properly.

Types of changes

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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Checklist

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• I have read the CONTRIBUTING.md
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

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did and what alternatives you considered, etc...

[OneLiteFeather]

We're fine