git: openjdk/jdk21u-dev: master: 8167252: Some of Charset.availableCharsets() does not contain itself

[Goetz Lindenmaier]

Changeset: 59ea8b01
Branch: master
Author:    Goetz Lindenmaier <goetz at openjdk.org>
Date:      2025-06-17 07:46:49 +0000
URL:       https://git.openjdk.org/jdk21u-dev/commit/59ea8b0104ba8f58d85924da49e5fc46f78e868e

8167252: Some of Charset.availableCharsets() does not contain itself

Backport-of: 3eeb681a0de87baa12b6eac5966e7f707b76c8bf

! src/java.base/share/classes/sun/nio/cs/Unicode.java
! src/jdk.charsets/share/classes/sun/nio/cs/ext/EUC_JP_Open.java.template
! src/jdk.charsets/share/classes/sun/nio/cs/ext/JISAutoDetect.java
! test/jdk/java/nio/charset/Charset/Contains.java