converted InteropEventEmitter java file to kotlin (#38144)

Summary:
Helping in [Kotlin-ify React Native tests](#37708), Converted [react/fabric/interop/InteropEventEmitterTest.java](https://github.com/facebook/react-native/tree/main/packages/react-native/ReactAndroid/src/test/java/com/facebook/react/fabric/interop/InteropEventEmitterTest.java) to kotlin file

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[INTERNAL] [CHANGED] - `InteropEventEmitterTest.java` file migrated from java to kotlin

Pull Request resolved: #38144

Test Plan:
Tests should pass
```
./gradlew :packages:react-native:ReactAndroid:test
```

Reviewed By: NickGerleman

Differential Revision: D47165007

Pulled By: mdvacca

fbshipit-source-id: 459b0867810eb1b782eea354d74152306b9546ff

packages/react-native/ReactAndroid/src/test/java/com/facebook/react/fabric/interop/InteropEventEmitterTest.kt

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.react.fabric.interop
+
+import com.facebook.react.bridge.JavaOnlyMap
+import com.facebook.react.bridge.ReactApplicationContext
+import com.facebook.react.bridge.ReactContext
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNotNull
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.RuntimeEnvironment
+
+@RunWith(RobolectricTestRunner::class)
+class InteropEventEmitterTest {
+  lateinit var reactContext: ReactContext
+  lateinit var eventDispatcher: FakeEventDispatcher
+
+  @Before
+  fun setup() {
+    reactContext = ReactApplicationContext(RuntimeEnvironment.application)
+    eventDispatcher = FakeEventDispatcher()
+  }
+
+  @Test
+  fun receiveEvent_dispatchesCorrectly() {
+    val eventEmitter = InteropEventEmitter(reactContext)
+    eventEmitter.overrideEventDispatcher(eventDispatcher)
+
+    eventEmitter.receiveEvent(42, "onTest", null)
+
+    assertEquals(1, eventDispatcher.getRecordedDispatchedEvents().size)
+    assertEquals("onTest", eventDispatcher.getRecordedDispatchedEvents().get(0).getEventName())
+    assertEquals(InteropEvent::class, eventDispatcher.getRecordedDispatchedEvents().get(0)::class)
+  }
+
+  @Test
+  fun receiveEvent_dataIsPreserved() {
+    val eventEmitter = InteropEventEmitter(reactContext)
+    eventEmitter.overrideEventDispatcher(eventDispatcher)
+    val eventData = JavaOnlyMap.of("color", "indigo")
+
+    eventEmitter.receiveEvent(42, "onTest", eventData)
+
+    val event = eventDispatcher.getRecordedDispatchedEvents().get(0) as InteropEvent
+    val dispatchedEventData = event.getEventData()
+    assertNotNull(dispatchedEventData)
+    assertEquals("indigo", dispatchedEventData!!.getString("color"))
+  }
+
+  @Test(expected = java.lang.UnsupportedOperationException::class)
+  fun receiveTouches_isNotSupported() {
+    val eventEmitter = InteropEventEmitter(reactContext)
+    eventEmitter.receiveTouches("a touch", null, null)
+  }
+}