RFR: 8248862: Implement Enhanced Pseudo-Random Number Generators [v4]

[Jim Laskey]

> This PR is to introduce a new random number API for the JDK. The primary API is found in RandomGenerator and RandomGeneratorFactory. Further description can be found in the JEP https://openjdk.java.net/jeps/356 .
> 
> javadoc can be found at http://cr.openjdk.java.net/~jlaskey/prng/doc/api/java.base/java/util/random/package-summary.html
> 
> old PR:  https://github.com/openjdk/jdk/pull/1273

Jim Laskey has updated the pull request incrementally with two additional commits since the last revision:

 - 8248862: Implement Enhanced Pseudo-Random Number Generators
   
   Fix extends
 - 8248862: Implement Enhanced Pseudo-Random Number Generators
   
   Use Map.of instead of Map.ofEntries

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/1292/files
  - new: https://git.openjdk.java.net/jdk/pull/1292/files/802fa530..ee8f87c3

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=1292&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=1292&range=02-03

  Stats: 169 lines in 15 files changed: 23 ins; 17 del; 129 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1292.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1292/head:pull/1292

PR: https://git.openjdk.java.net/jdk/pull/1292