RFR: 8366833: Poly1305 does not always correctly update position for array-backed ByteBuffers after processMultipleBlocks [v2]

[Jamil Nimeh]

> This fix resolves an issue where the `Cipher.updateAAD(ByteBuffer)` method, when used on a ChaCha20-Poly1305 Cipher, may throw an exception due to an offset calculation error.  This occurs when the ByteBuffer is array-backed, and when the buffer passed into the method is a slice of another array-backed buffer and that slice begins at a non-zero offset in the parent ByteBuffer.
> 
> Credit and thanks to @jaikiran for finding the issue and providing reproducer code.

Jamil Nimeh has updated the pull request incrementally with one additional commit since the last revision:

  Remove unneeded comments

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Changes:
  - all: https://git.openjdk.org/jdk/pull/27081/files
  - new: https://git.openjdk.org/jdk/pull/27081/files/cfff7fe7..12e08a77

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27081&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27081&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/27081.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27081/head:pull/27081

PR: https://git.openjdk.org/jdk/pull/27081