RFR: 8360887: [AIX] getFileAttributeView returns unusable FileAttributeView if UserDefinedFileAttributeView unavailable [v2]

[Martin Doerr]

> We need to fix this wrong behavior on AIX and the test should catch it. Please review!

Martin Doerr has updated the pull request incrementally with two additional commits since the last revision:

 - Update Copyright years.
 - Add bug id to test.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/26021/files
  - new: https://git.openjdk.org/jdk/pull/26021/files/d57612ef..a8ffcbc0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26021&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26021&range=00-01

  Stats: 3 lines in 2 files changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/26021.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26021/head:pull/26021

PR: https://git.openjdk.org/jdk/pull/26021