Add `java.io.PrintOutput` to represent print operations, and modify `java.io.PrintStream` and `java.io.PrintWriter` to implement it.
------------- Commit messages: - remove `@since 1.5` - Make PrintWriter implement PrintOutput - Make PrintStream implement PrintOutput - Create PrintOutput.java Changes: https://git.openjdk.org/jdk/pull/12277/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12277&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8301043 Stats: 589 lines in 3 files changed: 587 ins; 0 del; 2 mod Patch: https://git.openjdk.org/jdk/pull/12277.diff Fetch: git fetch https://git.openjdk.org/jdk pull/12277/head:pull/12277 PR: https://git.openjdk.org/jdk/pull/12277
