Clean up support of typed "unmodifiable", "singleton" Maps/Sets/Collections

[cowtowncoder]

(note: follow-up for #3009)

Support for Type Id for various "special" JDK collections, maps, in JavaUtilCollectionsDeserializers is messy at this point, trying to automatically detect actual classes involved. Instead it might make sense to use simpler (if less flexible) approach used with #3009, but use it for all supported types (unmodifiable, singleton, synchronized), and avoid having to load in implementations eagerly.

[cowtowncoder]

Note: slightly related to #2900 as well. Wonder if we need to check for java.util.ImmutableCollections$xxx as well.