[code-reflection] RFR: Array view and PtrOp changes

[Ruby Chen]

Implementing suggested array view and ptrOp changes, cleaning up code.

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Commit messages:
 - Array view and PtrOp changes

Changes: https://git.openjdk.org/babylon/pull/814/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=814&range=00
  Stats: 47 lines in 4 files changed: 20 ins; 14 del; 13 mod
  Patch: https://git.openjdk.org/babylon/pull/814.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/814/head:pull/814

PR: https://git.openjdk.org/babylon/pull/814