[jdk17u-dev] RFR: 8328819: Remove applet usage from JFileChooser tests bug6698013

[Goetz Lindenmaier]

I backport this for parity with 17.0.15-oracle.

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Commit messages:
 - Backport e3588bba0451d7d505b0e22d014842110677041b

Changes: https://git.openjdk.org/jdk17u-dev/pull/3204/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3204&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328819
  Stats: 77 lines in 2 files changed: 20 ins; 39 del; 18 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3204.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3204/head:pull/3204

PR: https://git.openjdk.org/jdk17u-dev/pull/3204