fix(java): auto-select child serializers for sorted containers (#3552)

## Why?
Auto serializer selection was falling back to JDK-compatible serializers
for eligible sorted/container subclasses such as `TreeSet`, `TreeMap`,
`ConcurrentSkipListSet`, `ConcurrentSkipListMap`, and `PriorityQueue`.
That routed child containers through the inefficient
`ObjectStreamSerializer` path even when the optimized child-container
strategy could preserve both container state and subclass fields.

## What does this PR do?

- extend `ChildContainerSerializers` with constructor-aware child
serializers for sorted sets, sorted maps, and priority queues
- teach auto-selection to use those serializers for eligible subclasses
instead of the JDK-compatible fallback
- register the new serializers in the builtin serializer factory and
GraalVM defaults
- add regression coverage for auto-selected sorted/container subclasses
with preserved child state and comparator behavior

## Related issues

Closes #3521.

## AI Contribution Checklist



- [ ] Substantial AI assistance was used in this PR: `yes` / `no`
- [ ] If `yes`, I included a completed [AI Contribution
Checklist](https://github.com/apache/fory/blob/main/AI_POLICY.md#9-contributor-checklist-for-ai-assisted-prs)
in this PR description and the required `AI Usage Disclosure`.
- [ ] If `yes`, my PR description includes the required `ai_review`
summary and screenshot evidence of the final clean AI review results
from both fresh reviewers on the current PR diff or current HEAD after
the latest code changes.



## Does this PR introduce any user-facing change?

- [ ] Does this PR introduce any public API change?
- [ ] Does this PR introduce any binary protocol compatibility change?

Author: chaokunyang

java/fory-core/src/main/java/org/apache/fory/serializer/Serializers.java

@@ -246,6 +246,15 @@ private static <T> Serializer<T> buildBuiltinSerializer(
     if (serializerClass == ChildContainerSerializers.ChildMapSerializer.class) {
       return new ChildContainerSerializers.ChildMapSerializer(typeResolver, type);
     }
+    if (serializerClass == ChildContainerSerializers.ChildSortedSetSerializer.class) {
+      return new ChildContainerSerializers.ChildSortedSetSerializer(typeResolver, type);
+    }
+    if (serializerClass == ChildContainerSerializers.ChildPriorityQueueSerializer.class) {
+      return new ChildContainerSerializers.ChildPriorityQueueSerializer(typeResolver, type);
+    }
+    if (serializerClass == ChildContainerSerializers.ChildSortedMapSerializer.class) {
+      return new ChildContainerSerializers.ChildSortedMapSerializer(typeResolver, type);
+    }
     if (serializerClass == SingletonCollectionSerializer.class) {
       return new SingletonCollectionSerializer(typeResolver, type);
     }