RFR: 8367142: Simplify java mirror handling in JNI methods [v2]

[David Holmes]

On Tue, 9 Sep 2025 22:10:19 GMT, Ioi Lam <iklam at openjdk.org> wrote:

> Arguably the translation of Java mirrors to Klasses is also a boundary (from Java representation to VM representation) :-)

The mirror is an oop, both oop and kklass are internal VM representations.

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PR Comment: https://git.openjdk.org/jdk/pull/27158#issuecomment-3273683492