[code-reflection] Integrated: Adding more support to the JavaCodeBuilder

[Gary Frost]

HAT does not support arrays directly (other than via views), but we want to be able to generate compute Java code (and C99) that includes arrays. 

Not quite got lambda's converted from code model to Java source.    Close, but not valid code.

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

Commit messages:
 - Adding more support to the JavaCodeBuilder... regenerating lambda's is hard

Changes: https://git.openjdk.org/babylon/pull/820/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=820&range=00
  Stats: 372 lines in 15 files changed: 248 ins; 108 del; 16 mod
  Patch: https://git.openjdk.org/babylon/pull/820.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/820/head:pull/820

PR: https://git.openjdk.org/babylon/pull/820