<i18n dev> RFR: 8285844: TimeZone.getTimeZone(ZoneOffset) does not work for all ZoneOffsets and returns GMT unexpected [v4]

[Naoto Sato]

> This is to extend the `Custom ID`s in `java.util.TimeZone` class to support second-level resolution, enabling round trips with `java.time.ZoneOffset`s. Corresponding CSR is also being drafted.

Naoto Sato has updated the pull request incrementally with one additional commit since the last revision:

  Minor fixup

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8606/files
  - new: https://git.openjdk.java.net/jdk/pull/8606/files/fcdaf512..9722decd

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8606&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8606&range=02-03

  Stats: 2 lines in 2 files changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8606.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8606/head:pull/8606

PR: https://git.openjdk.java.net/jdk/pull/8606