RFR: 8280818: Expand bug8033699.java to iterate over all LaFs

[Rajat Mahajan]

Added code to Iterates over all installed Look and Feel environments and added related exception handling.

Testing done.

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Commit messages:
 - removed unnecessary import
 - code refactoring
 - modified code to do exception handling better
 - 8280818: Expand bug8033699.java to iterate over all LaFs

Changes: https://git.openjdk.org/jdk/pull/23964/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23964&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8280818
  Stats: 110 lines in 1 file changed: 56 ins; 40 del; 14 mod
  Patch: https://git.openjdk.org/jdk/pull/23964.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23964/head:pull/23964

PR: https://git.openjdk.org/jdk/pull/23964