RFR: JDK-8340077 : Open source few Checkbox tests - Set2 [v4]

[Harshitha Onkar]

> Following tests are updated in this PR:
> 
> 1. 	test/jdk/java/awt/Checkbox/CheckboxBoxSizeTest.java
> 2. 	test/jdk/java/awt/Checkbox/CheckboxIndicatorSizeTest.java
> 3. 	test/jdk/java/awt/Checkbox/CheckboxNullLabelTest.java
> 4. 	test/jdk/java/awt/Checkbox/CheckboxPreferredSizeTest.java

Harshitha Onkar has updated the pull request incrementally with one additional commit since the last revision:

  review fixes, updated problemlist

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Changes:
  - all: https://git.openjdk.org/jdk/pull/21094/files
  - new: https://git.openjdk.org/jdk/pull/21094/files/a45d86bb..84249711

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21094&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21094&range=02-03

  Stats: 29 lines in 4 files changed: 7 ins; 13 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/21094.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21094/head:pull/21094

PR: https://git.openjdk.org/jdk/pull/21094