RFR: 8361495: (fc) Async close of streams connected to uninterruptible FileChannel doesn't throw AsynchronousCloseException in all cases [v6]

[Brian Burkhalter]

> Throw `AsynchronousCloseException` from `FileChannelImpl` methods if the channel is uninterruptible and was closed before the method (operation) could complete.

Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:

  8361495: More test improvement

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/26435/files
  - new: https://git.openjdk.org/jdk/pull/26435/files/dd4093a1..1f323f42

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26435&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26435&range=04-05

  Stats: 26 lines in 1 file changed: 3 ins; 15 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/26435.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26435/head:pull/26435

PR: https://git.openjdk.org/jdk/pull/26435