RFR: 8337143: (fc, fs) Move filesystem-related native objects from libnio to libjava [v3]

[Brian Burkhalter]

> This proposed change would move the native objects required for NIO file interaction from the libnio native library to the libjava native library on Linux, macOS, and Windows.

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

  8337143: Removed dependency of libjava on headers in libnio/ch

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Changes:
  - all: https://git.openjdk.org/jdk/pull/20317/files
  - new: https://git.openjdk.org/jdk/pull/20317/files/48519737..7e8a02e3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20317&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20317&range=01-02

  Stats: 305 lines in 17 files changed: 141 ins; 151 del; 13 mod
  Patch: https://git.openjdk.org/jdk/pull/20317.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20317/head:pull/20317

PR: https://git.openjdk.org/jdk/pull/20317