RFR: 8329623: NegativeArraySizeException encoding large String to UTF-8

[Roger Riggs]

When encoding a vary large string in String.getBytes(StandardCharset.UTF_8) computation of the buffer size may exceed the range of a positive 32-bit Integer.
If the estimated size for the result byte array is too large, pre-compute the exact buffer size. 
If that exceeds the range, then throw OutOfMemoryError.

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Commit messages:
 - 8329623: NegativeArraySizeException encoding large String to UTF-8

Changes: https://git.openjdk.org/jdk/pull/18663/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18663&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8329623
  Stats: 78 lines in 2 files changed: 76 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/18663.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18663/head:pull/18663

PR: https://git.openjdk.org/jdk/pull/18663