RFR: 8357176: java.awt javadoc code examples still use Applet API

[Phil Race]

Update the some code examples and accompanying images to no longer mention or display as applets.

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Commit messages:
 - 8357176

Changes: https://git.openjdk.org/jdk/pull/25278/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25278&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8357176
  Stats: 164 lines in 17 files changed: 47 ins; 20 del; 97 mod
  Patch: https://git.openjdk.org/jdk/pull/25278.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25278/head:pull/25278

PR: https://git.openjdk.org/jdk/pull/25278