RFR: 8332161: Need a test for restoring echo in the Console implementation (java.base)

[Naoto Sato]

This test intends to verify the behavior of JdkConsole for the java.base module, wrt restoring the echo. The test assumes the internal methods that sets/gets the echo status of the platform.

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Depends on: https://git.openjdk.org/jdk/pull/19184

Commit messages:
 - initial commit

Changes: https://git.openjdk.org/jdk/pull/19315/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19315&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8332161
  Stats: 196 lines in 2 files changed: 196 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/19315.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19315/head:pull/19315

PR: https://git.openjdk.org/jdk/pull/19315