JAIPilot v8 evaluation mirror: Guava #8589 - #2

...backing list
TransformingRandomAccessList previously relied on the JDK's default
List.spliterator(), which for RandomAccess lists falls back to
AbstractList.RandomAccessSpliterator. That implementation is
index-based and translates concurrent structural changes into a
ConcurrentModificationException, even when the backing list (e.g.
CopyOnWriteArrayList) is documented to never throw one.
Override spliterator() to delegate to the backing list's own
spliterator via CollectSpliterators.map(), and forEach() to delegate
directly to the backing list's forEach(), so transformed views inherit
the concurrency and other characteristics of their source list.
Fixes google#8165 

...m PR head)