[jdk17u-dev] RFR: 8354365: Opensource few Modal and Full Screen related tests

[Satyen Subramaniam]

Backporting JDK-8354365: Opensource few Modal and Full Screen related tests. Adds three modal/full screen related tests. Ran GHA Sanity Checks and new tests directly. Patch is clean. Backporting for parity with Oracle.

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Commit messages:
 - Backport e21387e0454e821e5720e781138dcc4c24a14ec7

Changes: https://git.openjdk.org/jdk17u-dev/pull/4090/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=4090&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8354365
  Stats: 488 lines in 5 files changed: 488 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/4090.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/4090/head:pull/4090

PR: https://git.openjdk.org/jdk17u-dev/pull/4090