RFR: 8353475: Open source two Swing DefaultCaret tests [v2]

[Phil Race]

> Open source two Swing caret related tests.

Phil Race has updated the pull request incrementally with one additional commit since the last revision:

  8353475

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Changes:
  - all: https://git.openjdk.org/jdk/pull/24455/files
  - new: https://git.openjdk.org/jdk/pull/24455/files/a62741ef..fbf9db6e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24455&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24455&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/24455.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24455/head:pull/24455

PR: https://git.openjdk.org/jdk/pull/24455