[jdk17u-dev] RFR: 8286872: Refactor add/modify notification icon (TrayIcon) [v2]

[Goetz Lindenmaier]

> I backport this for parity with 17.0.6-oracle.

Goetz Lindenmaier has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase.

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Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/871/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/871/files/425cb676..425cb676

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=871&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=871&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/871.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/871/head:pull/871

PR: https://git.openjdk.org/jdk17u-dev/pull/871