RFR: 8367943: PipedOutputStream write(0, 0) successful after close()

[Brian Burkhalter]

Update the specification of `java.io.PipedOutputStream.write(byte[],int,int)` to match longstanding behavior. Add a verification to an existing test.

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

Commit messages:
 - 8367943: PipedOutputStream write(0, 0) successful after close()

Changes: https://git.openjdk.org/jdk/pull/28078/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28078&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8367943
  Stats: 19 lines in 2 files changed: 8 ins; 3 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/28078.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28078/head:pull/28078

PR: https://git.openjdk.org/jdk/pull/28078