RFR: JDK-8289077: Add manual tests to open

[Harshitha Onkar]

Following manual tests added -

1. test/jdk/java/awt/Frame/ALTTABIconBeingErased/ALTTABIconBeingErased.java
2. test/jdk/java/awt/Icon/IconChangingTest/IconChangingTest.java
3. test/jdk/java/awt/Icon/IconShowingTest/IconShowingTest.java
4. test/jdk/java/awt/Icon/IconTransparencyTest/IconTransparencyTest.java
5. test/jdk/java/awt/Icon/SetLargeIconTest/SetLargeIconTest.java

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

Commit messages:
 - added manual tests

Changes: https://git.openjdk.org/jdk/pull/12447/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12447&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8289077
  Stats: 940 lines in 7 files changed: 940 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/12447.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12447/head:pull/12447

PR: https://git.openjdk.org/jdk/pull/12447