RFR: 8357690: Add @Stable and final to java.lang.CharacterDataLatin1 and other CharacterData classes

[Per Minborg]

On Sat, 24 May 2025 10:00:56 GMT, Shaojin Wen <swen at openjdk.org> wrote:

> Classes such as java.lang.CharacterDataXXX have multiple static final arrays, these are immutable, We should add `@Stable` and final to provide information to the optimizer.

We could add '@Stable` to `static final char[][][] charMap` as well.

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PR Comment: https://git.openjdk.org/jdk/pull/25430#issuecomment-2909388887