RFR: 8328124: Convert java/awt/Frame/ShownOnPack/ShownOnPack.html applet test to main [v2]

[Alexander Zvegintsev]

> The test is converted to main.
> Tested on Linux, Macos and Windows.

Alexander Zvegintsev has updated the pull request incrementally with one additional commit since the last revision:

  add empty line

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/18287/files
  - new: https://git.openjdk.org/jdk/pull/18287/files/1e797b7f..85a4cfe9

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18287&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18287&range=00-01

  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/18287.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18287/head:pull/18287

PR: https://git.openjdk.org/jdk/pull/18287