[fix][broker] Fix NPE when update topic properties.

### Motivation

In Pulsar 2.10, when creating a producer/consumer that auto-creates a topic and then attempts to update its properties, a NullPointerException (NPE) occurs. The reason is that Pulsar 2.10 does not correctly handle the case when the properties are `null`.
### Modifications

Add an NPE check.

(cherry picked from commit 0b02321)

pulsar-broker/src/main/java/org/apache/pulsar/broker/service/BrokerService.java

@@ -1433,7 +1433,8 @@ private void checkOwnershipAndCreatePersistentTopic(final String topic, boolean
         pulsar.getNamespaceService().isServiceUnitActiveAsync(topicName)
                 .thenAccept(isActive -> {
                     if (isActive) {
-                        createPersistentTopic(topic, createIfMissing, topicFuture, properties);
+                        createPersistentTopic(topic, createIfMissing, topicFuture,
+                                properties == null ? new HashMap<>() : properties);
                     } else {
                         // namespace is being unloaded
                         String msg = String.format("Namespace is being unloaded, cannot add topic %s", topic);

pulsar-broker/src/test/java/org/apache/pulsar/broker/admin/TopicPoliciesTest.java

@@ -32,6 +32,7 @@
 import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
@@ -178,6 +179,19 @@ public void testTopicPolicyInitialValueWithNamespaceAlreadyLoaded() throws Excep
     }
 
 
+    @Test
+    public void updatePropertiesForAutoCreatedTopicTest() throws Exception {
+        TopicName topicName = TopicName.get(
+                TopicDomain.persistent.value(),
+                NamespaceName.get(myNamespace),
+                "test-" + UUID.randomUUID()
+        );
+        String testTopic = topicName.toString();
+        Producer<byte[]> producer = pulsarClient.newProducer().topic(testTopic).create();
+        HashMap<String, String> properties = new HashMap<>();
+        properties.put("backlogQuotaType", "message_age");
+        admin.topics().updateProperties(testTopic, properties);
+    }
     @Test
     public void testSetSizeBasedBacklogQuota() throws Exception {