[jdk16u] RFR: 8260592: jpackage tests fail when Desktop is not supported

[Aleksey Shipilev]

This unbreaks jpackage tests on x86_32 cross-compiled builds. 

Additional testing:
 - [x] Linux x86_32 `tools/jpackage` (pass cleanly)

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Commit messages:
 - Backport 24a262124f507759d72cddc0d1371b31ef1661cf

Changes: https://git.openjdk.java.net/jdk16u/pull/70/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk16u&pr=70&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8260592
  Stats: 6 lines in 1 file changed: 6 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk16u/pull/70.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk16u pull/70/head:pull/70

PR: https://git.openjdk.java.net/jdk16u/pull/70