[jdk11u-dev] RFR: 8264208: Console charset API

[Stephanie Crater]

Backport of JDK-8264208

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Depends on: https://git.openjdk.org/jdk11u-dev/pull/1225

Commit messages:
 - Backport bebfae48e3f1643f2456d680d170dcc22f7231bf

Changes: https://git.openjdk.org/jdk11u-dev/pull/1226/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1226&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8264208
  Stats: 213 lines in 10 files changed: 184 ins; 12 del; 17 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1226.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1226/head:pull/1226

PR: https://git.openjdk.org/jdk11u-dev/pull/1226