RFR: 8208761: Update constant collections to use the new immutable collections

[Nir Lisker]

Resubmitting from before the transition to this repo. See linked issue for details.

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Commits:
 - 440e7a88: Initial commit of 8208761

Changes: https://git.openjdk.java.net/jfx/pull/104/files
 Webrev: https://webrevs.openjdk.java.net/jfx/104/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8208761
  Stats: 972 lines in 18 files changed: 180 ins; 279 del; 513 mod
  Patch: https://git.openjdk.java.net/jfx/pull/104.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/104/head:pull/104

PR: https://git.openjdk.java.net/jfx/pull/104