RFR: 8361587: AssertionError in File.listFiles() when path is empty and -esa is enabled [v4]

[Brian Burkhalter]

> Changes to address `File.listFiles` invoked on an empty path. This fixes an oversight in #22821.

Brian Burkhalter has updated the pull request incrementally with two additional commits since the last revision:

 - 8361587: Fix omission in previous commit
 - 8361587: Address reviewer comments

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Changes:
  - all: https://git.openjdk.org/jdk/pull/26224/files
  - new: https://git.openjdk.org/jdk/pull/26224/files/afaa9329..2e42c991

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26224&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26224&range=02-03

  Stats: 7 lines in 1 file changed: 3 ins; 2 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/26224.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26224/head:pull/26224

PR: https://git.openjdk.org/jdk/pull/26224