RFR: 8353957: Open source several AWT ScrollPane tests - Batch 1 [v2]

[Tejesh R]

> Open source these AWT ScrollPane tests:
> 
> java/awt/ScrollPane/ScrollPaneFlicker/ScrollPaneFlicker.java
> java/awt/ScrollPane/ScrollbarsAsNeeded/ScrollbarsAsNeededTest.java
> java/awt/ScrollPane/ScrollPanePaint/ScrollPanePaint.java
> java/awt/ScrollPane/ScrollPositionTest/ScrollPositionTest.java

Tejesh R has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains three commits:

 - Merge conflict
 - Open source
 - Open source

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Changes: https://git.openjdk.org/jdk/pull/24684/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24684&range=01
  Stats: 520 lines in 5 files changed: 520 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/24684.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24684/head:pull/24684

PR: https://git.openjdk.org/jdk/pull/24684