<i18n dev> RFR: 8348205: Improve cutover time selection when building available currencies set [v2]

[Justin Lu]

> Please review this PR which improves the time measurement for cut-over time comparisons when building the available set of currencies in _java.util.Currency._ Currently, a new time was measured for each special case currency. This PR updates the behavior to use the same time for all such cases

Justin Lu has updated the pull request incrementally with one additional commit since the last revision:

  reflect review

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Changes:
  - all: https://git.openjdk.org/jdk/pull/23309/files
  - new: https://git.openjdk.org/jdk/pull/23309/files/9305f954..c49fb581

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23309&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23309&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/23309.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23309/head:pull/23309

PR: https://git.openjdk.org/jdk/pull/23309