RFR: 8361842: Move input validation checks to Java for java.lang.StringCoding intrinsics [v15]

[John R Rose]

On Wed, 13 Aug 2025 14:20:30 GMT, Claes Redestad <redestad at openjdk.org> wrote:

> … to help the compiler do the right thing with more ease and perhaps slightly faster

If the Java code is good enough, then the precondition method can simply be marked `@ForceInline`.

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PR Comment: https://git.openjdk.org/jdk/pull/25998#issuecomment-3189790415