Various behavior-preserving code cleanups related to system properties related to character encodings.
------------- Commit messages: - More minor cleanups, reversion of some extra changes. - WIP: add some non-null asserts and comments on sprops encoding members - A couple small tweaks. - Merge branch 'master' into JDK-8351740-encoding-properties-cleanup - Move platformProperties() native method declaration back to the bottom - 8351740: Clean up some logic around initialization of encoding properties Changes: https://git.openjdk.org/jdk/pull/24463/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24463&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8351740 Stats: 51 lines in 5 files changed: 19 ins; 8 del; 24 mod Patch: https://git.openjdk.org/jdk/pull/24463.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/24463/head:pull/24463 PR: https://git.openjdk.org/jdk/pull/24463
