RFR: 8376297: ArrayIndexOutOfBoundsException Not Documented for SinglePixelPackedSampleModel.getSampleSize(int)

[Phil Race]

Update the specification of concrete SampleModel classes which over-ride getSampleSize(int band) to describe how the behave.
It isn't entirely pretty because 2 of them ignore the band parameter and always have ..

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Commit messages:
 - 8376297
 - 8376297

Changes: https://git.openjdk.org/jdk/pull/29457/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29457&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8376297
  Stats: 106 lines in 4 files changed: 100 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/29457.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29457/head:pull/29457

PR: https://git.openjdk.org/jdk/pull/29457