feat: McpSession/McpAsyncSession implements AutoCloseable

Author: wenhaozhao

core/src/main/java/com/google/adk/tools/mcp/McpAsyncSession.java

@@ -3,7 +3,7 @@
 import io.modelcontextprotocol.client.McpAsyncClient;
 import io.modelcontextprotocol.spec.McpSchema;
 
-public class McpAsyncSession {
+public class McpAsyncSession implements AutoCloseable {
     private final McpAsyncClient client;
     private final McpSchema.InitializeResult initResult;
 
@@ -19,4 +19,9 @@ public McpAsyncClient client() {
     public McpSchema.InitializeResult initResult() {
         return this.initResult;
     }
+
+    @Override
+    public void close() throws Exception {
+        this.client.close();
+    }
 }

core/src/main/java/com/google/adk/tools/mcp/McpSession.java

@@ -3,7 +3,7 @@
 import io.modelcontextprotocol.client.McpSyncClient;
 import io.modelcontextprotocol.spec.McpSchema;
 
-public class McpSession {
+public class McpSession implements AutoCloseable {
 
     private final McpSyncClient client;
     private final McpSchema.InitializeResult initResult;
@@ -20,4 +20,9 @@ public McpSyncClient client() {
     public McpSchema.InitializeResult initResult() {
         return this.initResult;
     }
+
+    @Override
+    public void close() throws Exception {
+        this.client.close();
+    }
 }