RFR: 8273506: java Robot API did the 'm' keypress and caused /awt/event/KeyEvent/KeyCharTest/KeyCharTest.html is timing out on macOS 12

[Alexander Zuev]

Clear the kCGEventFlagMaskSecondaryFn flag if it is set before posting keyboard events to the system queue.

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Commit messages:
 - 8273506: java Robot API did the 'm' keypress and caused /awt/event/KeyEvent/KeyCharTest/KeyCharTest.html is timing out on macOS 12

Changes: https://git.openjdk.java.net/jdk/pull/8320/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8320&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8273506
  Stats: 5 lines in 1 file changed: 5 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8320.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8320/head:pull/8320

PR: https://git.openjdk.java.net/jdk/pull/8320