RFR: 8283715: Update ObjectStreamClass to be final [v3]

[Jaikiran Pai]

On Wed, 30 Mar 2022 06:17:54 GMT, Stuart Marks <smarks at openjdk.org> wrote:

>> Pretty much just what it says.
>
> Stuart Marks has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update copyright year.

Marked as reviewed by jpai (Committer).

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PR: https://git.openjdk.java.net/jdk/pull/8009