RFR: 8248862: Implement Enhanced Pseudo-Random Number Generators [v19]

[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 with a new target base due to a merge or a rebase. The pull request now contains 50 commits:

 - Merge branch 'master' into 8248862
 - Update tests for RandomGeneratorFactory.all()
 - Merge branch 'master' into 8248862
 - Flatten out use of all()
 - Add review edits
 - Added table of available algorithms.
 - Merge branch 'master' into 8248862
 - Update SplittableRandom to remove unnecessary overrides
 - Updated API based on CSR review.
 - Update package info to credit LMX algorithm
 - ... and 40 more: https://git.openjdk.java.net/jdk/compare/f94a8452...7d0ebfc9

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Changes: https://git.openjdk.java.net/jdk/pull/1292/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1292&range=18
  Stats: 13341 lines in 26 files changed: 11195 ins; 2055 del; 91 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