[jdk11u-dev] RFR: 8294535: Add screen capture functionality to PassFailJFrame

[Andrew Lu]

I backport this for parity with 11.0.23-oracle.

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Commit messages:
 - Backport dbb788f34dbbe0aa5c8356fb4a5dc19b96787d25

Changes: https://git.openjdk.org/jdk11u-dev/pull/2539/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2539&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8294535
  Stats: 224 lines in 1 file changed: 219 ins; 1 del; 4 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2539.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2539/head:pull/2539

PR: https://git.openjdk.org/jdk11u-dev/pull/2539