RFR: JDK-8325189: Enable this-escape javac warning in java.base

[Joe Darcy]

On Fri, 2 Feb 2024 23:38:41 GMT, Joe Darcy <darcy at openjdk.org> wrote:

> In its initial form, the changes are tested on Linux. Later on, I'll do cross-platform builds to make sure there aren't any, say, windows-specific changes that are needed as well.
> 
> I can file a follow-up umbrella bug with the original list of ~200 warnings so the constructors and initializers in question can be examined to see if they should be updated.

Filed [JDK-8325263](https://bugs.openjdk.org/browse/JDK-8325263) .

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PR Comment: https://git.openjdk.org/jdk/pull/17692#issuecomment-1928049947