RFR: 8306372: Open source AWT CardLayout and Checkbox tests

[Phil Race]

Moves to open some AWT tests, two for CardLayout and four for CheckBox

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

Commit messages:
 - 8306372

Changes: https://git.openjdk.org/jdk/pull/13543/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13543&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8306372
  Stats: 364 lines in 6 files changed: 364 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/13543.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13543/head:pull/13543

PR: https://git.openjdk.org/jdk/pull/13543