RFR: 8254631: Better support ALPN byte wire values in SunJSSE

[Bradford Wetmore]

Certain TLS ALPN values can't be properly read or written by the SunJSSE provider. This is due to the choice of Strings as the API interface and the undocumented internal use of the UTF-8 Character Set which converts characters larger than U+00007F into multi-byte arrays that may not be expected by a peer.

Full details are available in:

- Bug:  https://bugs.openjdk.java.net/browse/JDK-8254631
- CSR:  https://bugs.openjdk.java.net/browse/JDK-8256817

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

Commit messages:
 - Code Review Comments 4
 - Code Review Comments #3
 - Code Review Comments #2
 - Code Review Comments
 - Seventh iteration
 - Sixth iteration
 - Fifth iteration
 - Fourth iteration
 - Third iteration
 - Second iteration
 - ... and 1 more: https://git.openjdk.java.net/jdk/compare/b52f6c05...9e6f0a4f

Changes: https://git.openjdk.java.net/jdk/pull/1440/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1440&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8254631
  Stats: 451 lines in 6 files changed: 440 ins; 1 del; 10 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1440.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1440/head:pull/1440

PR: https://git.openjdk.java.net/jdk/pull/1440