RFR: 8354365: Opensource few Modal and Full Screen related tests [v2]

[Abhishek Kumar]

> Few Modal and Full Screen related tests are converted from applet and open sourced.

Abhishek Kumar has updated the pull request incrementally with one additional commit since the last revision:

  Review fix

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Changes:
  - all: https://git.openjdk.org/jdk/pull/24685/files
  - new: https://git.openjdk.org/jdk/pull/24685/files/6eaa3526..82991942

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24685&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24685&range=00-01

  Stats: 8 lines in 2 files changed: 2 ins; 2 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/24685.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24685/head:pull/24685

PR: https://git.openjdk.org/jdk/pull/24685