Replace broken getProperty with Boolean.getBoolean. Manual testing confirms trace messages are enabled with `-Dresource.bundle.debug=true`
------------- Commit messages: - 8345818: Fix SM cleanup of parsing of System property resource.bundle.debug Changes: https://git.openjdk.org/jdk/pull/22649/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22649&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8345818 Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/22649.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/22649/head:pull/22649 PR: https://git.openjdk.org/jdk/pull/22649
