Add missing interfaces to emulated classes

[zbynek]

Some missing interfaces found when working on #10208

Out of scope here:

• adding default implementations to RandomGenerator (Implement RandomGenerator default methods up to Java 17 #10214)
• adding Serializable to any classes
• implementing methods in Constable / ConstantDesc -- only use those as tagging interfaces for now
• adding Readable interface as it depends on nio
• adding Cloneable to Locale
• adding any new interfaces to java.lang.reflect or java.lang.invoke implemented by Class

[jnehlmeier]

In a GWT fork at work I had added Serializable to ArrayDeque (and added a GWT-RPC CustomFieldSerializer for it) but ArrayDeque does not appear here. Maybe you missed some more classes?

[niloc132]

There are definitely some others that are missing too, mostly collections - I think those are going to get a closer look before adding them.

[zbynek]

Maybe you missed some more classes?

I did not add Serializable to any class here and I'm not planning to do that, I'm leaving that to someone with more experience with GWT RPC.

Out of public classes, these are serializable in JRE but not in GWT:

• java.lang.Class
• java.lang.StringBuffer
• java.lang.StringBuilder
• java.util.AbstractMap$SimpleEntry
• java.util.AbstractMap$SimpleImmutableEntry
• java.util.ArrayDeque
• java.util.BitSet
• java.util.EnumMap
• java.util.EnumSet
• java.util.EventObject
• java.util.Locale
• java.util.PriorityQueue
• java.util.Random
• java.util.concurrent.ConcurrentHashMap
• java.util.concurrent.atomic.AtomicReference
• java.util.concurrent.atomic.AtomicReferenceArray

Also there are other issues related to serializing private collection classes (#10048, #3071)

[niloc132]

LGTM, we can try to address some of the others later, though some (Locale, Random, Class to name three) probably won't make sense ever.