RFR: 8352860: Open source events tests batch0

[Alexander Zvegintsev]

Few events tests are opensourced

* java/awt/event/ClickEventsTest.java
* java/awt/event/WindowActivatedEventTest.java

Testing is good

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Commit messages:
 - initial

Changes: https://git.openjdk.org/jdk/pull/24293/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24293&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8352860
  Stats: 302 lines in 2 files changed: 302 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/24293.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24293/head:pull/24293

PR: https://git.openjdk.org/jdk/pull/24293