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

[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.

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Commit messages:
 - Fix whitespace errors, add trailing newline
 - merge with main
 - 8366833: Poly1305 does not always correctly update position for array-backed ByteBuffers after processMultipleBlocks

Changes: https://git.openjdk.org/jdk/pull/27081/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27081&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8366833
  Stats: 135 lines in 2 files changed: 133 ins; 0 del; 2 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