RFR: 8299807: newStringUTF8NoRepl and getBytesUTF8NoRepl always copy arrays

[Glavo]

`JavaLangAccess::newStringUTF8NoRepl` and `JavaLangAccess::getBytesUTF8NoRepl` are not implemented correctly. They always copy arrays, rather than avoiding copying as much as possible as javadoc says.

I ran the tier1 test without any new errors.

-------------

Commit messages:
 - fix: newStringUTF8NoRepl and getBytesUTF8NoRepl always copy arrays

Changes: https://git.openjdk.org/jdk/pull/11897/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11897&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8299807
  Stats: 9 lines in 1 file changed: 7 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/11897.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11897/head:pull/11897

PR: https://git.openjdk.org/jdk/pull/11897