Recognize actor (distributed) methods and extensions as Async functions

Samples/SwiftJavaExtractJNISampleApp/Sources/MySwiftLibrary/Distributed.swift

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+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2026 Apple Inc. and the Swift.org project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of Swift.org project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
+import Distributed
+import SwiftJava
+
+public distributed actor DistributedHi {
+  public typealias ActorSystem = LocalTestingDistributedActorSystem
+  public distributed func hi() -> String {
+    "hi"
+  }
+}
+
+public func makeDistributedHi() -> DistributedHi {
+  DistributedHi(actorSystem: LocalTestingDistributedActorSystem())
+}

Samples/SwiftJavaExtractJNISampleApp/src/test/java/com/example/swift/DistributedTest.java

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+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2026 Apple Inc. and the Swift.org project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of Swift.org project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
+package com.example.swift;
+
+import org.junit.jupiter.api.Test;
+import org.swift.swiftkit.core.SwiftArena;
+
+import java.util.concurrent.Future;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class DistributedTest {
+
+    @Test
+    void distributedMethodReturnsFuture() throws Exception {
+        try (var arena = SwiftArena.ofConfined()) {
+            DistributedHi greeter = MySwiftLibrary.makeDistributedHi(arena);
+
+            Future<String> greeting = greeter.hi();
+            assertEquals("hi", greeting.get());
+        }
+    }
+}