RFR: 8352865: Open source several AWT TextComponent tests - Batch 2

[Tejesh R]

Open source these AWT TextComponent tests:

java/awt/TextComponent/SelectionAndCaretColor/SelectionAndCaretColor.java
java/awt/TextComponent/SelectionTest/SelectionTest.java
java/awt/TextComponent/CorrectTextComponentSelectionTest/CorrectTextComponentSelectionTest.java
java/awt/TextComponent/AltPlusNumberKeyCombinationsTest/AltPlusNumberKeyCombinationsTest.java

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Commit messages:
 - Open source

Changes: https://git.openjdk.org/jdk/pull/24477/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24477&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8352865
  Stats: 448 lines in 5 files changed: 448 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/24477.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24477/head:pull/24477

PR: https://git.openjdk.org/jdk/pull/24477