Fix #3308, #3350: better reporting of javalib stream & spliterator characteristics

[LeeTibbert]

1. Fix javalib ArrayList#spliterator should report ORDERED characteristic. #3350: spliterator returned by javalib ArrayList#spliterator now matches a JVM by reporting the
   ORDERED characteristic.

2. Fix javalib BaseStream.unordered() method is hard broken. #3308: the javalib stream returned by the unordered method on Stream or DoubleStream
   with an ORDERED stream argument now returns characteristics matching a JVM. ORDERED
   is not present. Only the DISTINCT and SORTED characteristics, if present, are passed along to
   the new stream.

The first fix is used to test the second fix and visa versa.

Note: The spliterator returned by ArrayList#spliterator now binds later, as part of the first
tryAdvance(). No attempt is made to detect ConcurrentModification, but the later
binding should narrow the window of vulnerability. Here "Best Effort" is zero effort.

[LeeTibbert]

One failing test looks like a Windows intermittent failure, unrelated to the substance of this PR

[info] Running run/build-library-dynamic
 [info] [launcher] getting org.scala-sbt sbt 1.5.8  (this may take some time)...
 [info] [launcher] getting Scala 2.12.14 (for sbt)...
[info] 
Error:  x run/build-library-dynamic 
sbt.internal.scripted.TestException: {line -1}  Reload for scripted batch execution failed.
	at sbt.scriptedtest.ScriptedTests.$anonfun$runBatchedTests$5(ScriptedTests.scala:229)