RFR: 8333774: Avoid eagerly loading various EmptySpliterator classes [v2]

[Claes Redestad]

> Trivially move a few private static finals to their respective source type to avoid eagerly loading a few small classes.

Claes Redestad has updated the pull request incrementally with two additional commits since the last revision:

 - revert typo
 - Copyright

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Changes:
  - all: https://git.openjdk.org/jdk/pull/19591/files
  - new: https://git.openjdk.org/jdk/pull/19591/files/5eb2ddd8..9d19bbe1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19591&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19591&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/19591.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19591/head:pull/19591

PR: https://git.openjdk.org/jdk/pull/19591