RFR: 8365703: Refactor ZipCoder to use common JLA.uncheckedNewStringNoRepl [v4]

[Roger Riggs]

> Simplify JLA by changing ZipCoder to use JLA.uncheckedNewStringNoRepl(byte[] bytes, Charset cs) instead of the JLA.newStringUTF8NoRepl.
> A copy of the bytes is made so it can be exclusively used to create the string. The "shared" flag is no longer needed in String.newStringUTF8NoRepl.

Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:

  Declare newStringUTF8NoRepl `private`, it no longer needs to be package private

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Changes:
  - all: https://git.openjdk.org/jdk/pull/26822/files
  - new: https://git.openjdk.org/jdk/pull/26822/files/aa245f84..f47c0c70

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26822&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26822&range=02-03

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/26822.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26822/head:pull/26822

PR: https://git.openjdk.org/jdk/pull/26822