RFR: 8377199: Remove AppContext from AWTKeyStroke

[Phil Race]

Remove AppContext from AWTKeyStroke

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

Commit messages:
 - 8377199

Changes: https://git.openjdk.org/jdk/pull/29581/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29581&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8377199
  Stats: 21 lines in 1 file changed: 8 ins; 11 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/29581.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29581/head:pull/29581

PR: https://git.openjdk.org/jdk/pull/29581