RFR: 8274396: Suppress more warnings on non-serializable non-transient intance fields in client libs

[Joe Darcy]

On Mon, 27 Sep 2021 21:40:13 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

> 
> 
> Can we add comments to SuppressWarnings on why it was added? Previously we use this text
> 
> > // Not statically typed as Serializable

Added in revision; used a different comment wording.

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PR: https://git.openjdk.java.net/jdk/pull/5723