Moving the built-in implementation of `Console` from `java.io` package into `jdk.internal.io` package. It now implements `JdkConsole` interface and is accessed through `ProxyingConsole`.
------------- Commit messages: - Split Console_md.c - 8298971: Move Console implementation into jdk internal package Changes: https://git.openjdk.org/jdk/pull/11729/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11729&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8298971 Stats: 820 lines in 5 files changed: 425 ins; 392 del; 3 mod Patch: https://git.openjdk.org/jdk/pull/11729.diff Fetch: git fetch https://git.openjdk.org/jdk pull/11729/head:pull/11729 PR: https://git.openjdk.org/jdk/pull/11729
