[jdk17u-dev] RFR: 8319817: Charset constructor should make defensive copy of aliases [v2]

[Todd V. Jonker]

> Clean backport.
> 
> Additional testing:
> - [x] New regression test fails without the fix, passes with it
> - [x] macosx-aarch64-server-release: `make test-tier1`
> - [x] linux-x86_64-server-release: `JTREG_KEYWORDS="!headful & !external-dep & !printer" make test TEST=all`
>     * These tests fail repeatedly, but also fail on `master`:
>         * `build/AbsPathsInImage.java`
>         *  `jdk/internal/platform/docker/TestDockerMemoryMetrics.java`

Todd V. Jonker has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'master' into charset-ctor for testing
 - Backport d6d7bdc7748c10963c3e58c0287b2472646bf36f

-------------

Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/2713/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/2713/files/9afe9b6b..99dbada0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2713&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2713&range=00-01

  Stats: 8853 lines in 216 files changed: 6995 ins; 1053 del; 805 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2713.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2713/head:pull/2713

PR: https://git.openjdk.org/jdk17u-dev/pull/2713