RFR: 8269806: Emoji rendering on Linux [v17]

[Nikita Gubarkov]

On Wed, 1 Feb 2023 09:31:35 GMT, Alexey Ushakov <avu at openjdk.org> wrote:

>> Which API exactly? I didn't know there is any, so I added this as a helper method.
>
> I suppose it's https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Character.html#charCount(int)

Oh thank you! There is `toChars` actually.

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PR: https://git.openjdk.org/jdk/pull/4798