RFR: 8354234: Remove friends for ObjectMonitor

[Coleen Phillimore]

On Thu, 10 Apr 2025 16:19:38 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> Please review this somewhat trivial change to remove unneeded friends from the ObjectMonitor class.  Two functions were made public for use with ObjectSynchronizer and avoid referencing fields directly from other places.
> Tested with tier1 sanity.

Thanks for reviewing, Axel and David.

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PR Comment: https://git.openjdk.org/jdk/pull/24580#issuecomment-2796581821