[jdk21u-dev] RFR: 8328560: java/awt/event/MouseEvent/ClickDuringKeypress/ClickDuringKeypress.java imports Applet

[Andrew Lu]

I backport this for parity with 21.0.5-oracle.

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Commit messages:
 - Backport e81374e0501a8201dac701824d2e29f2cedfcdff

Changes: https://git.openjdk.org/jdk21u-dev/pull/738/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=738&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328560
  Stats: 112 lines in 1 file changed: 24 ins; 56 del; 32 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/738.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/738/head:pull/738

PR: https://git.openjdk.org/jdk21u-dev/pull/738