Update sample

Author: rintaro

Samples/SwiftKitSampleApp/src/main/java/com/example/swift/HelloJava2Swift.java

@@ -88,14 +88,11 @@ static void examples() {
             var origDat = Data.init(origBytes, origBytes.byteSize(), arena);
             SwiftRuntime.trace("origDat.count = " + origDat.getCount());
 
-            // var origBytes = arena.allocate(ValueLayout.JAVA_INT, arry.length);
-            // origBytes.copyFrom(MemorySegment.ofArray(arry));
-            // var dat = MySwiftLibrary.globalReceiveReturnData(origDat, arena);
-            // dat.withUnsafeBytes((retBytes) -> {
-            //    SwiftKit.trace("retBytes=" + retBytes.toArray(ValueLayout.JAVA_INT)[1]);
-            //    SwiftKit.trace("foobar");
-            // });
-            //SwiftKit.trace(origDat);
+            var retDat = MySwiftLibrary.globalReceiveReturnData(origDat, arena);
+            retDat.withUnsafeBytes((retBytes) -> {
+                var str = retBytes.getString(0);
+                SwiftRuntime.trace("retStr=" + str);
+            });
         }