converted JavaScriptModuleRegistryTest java file to kotlin (#38143)

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

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

Pull Request resolved: #38143

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

Reviewed By: NickGerleman

Differential Revision: D47164993

Pulled By: mdvacca

fbshipit-source-id: 6aee2bcb2766fc2e6d68f4df272aaafb9c65bdcb

packages/react-native/ReactAndroid/src/test/java/com/facebook/react/bridge/JavaScriptModuleRegistryTest.kt

@@ -0,0 +1,34 @@
+/*
+ * 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.bridge
+
+import org.junit.Assert
+import org.junit.Test
+
+/** Tests for [JavaScriptModuleRegistry] */
+class JavaScriptModuleRegistryTest {
+  private interface TestJavaScriptModule : JavaScriptModule {
+    fun doSomething()
+  }
+
+  private interface `OuterClass$NestedInnerClass` : JavaScriptModule {
+    fun doSomething()
+  }
+
+  @Test
+  fun testGetJSModuleName() {
+    val name = JavaScriptModuleRegistry.getJSModuleName(TestJavaScriptModule::class.java)
+    Assert.assertEquals("TestJavaScriptModule", name)
+  }
+
+  @Test
+  fun testGetJSModuleName_stripOuterClass() {
+    val name = JavaScriptModuleRegistry.getJSModuleName(`OuterClass$NestedInnerClass`::class.java)
+    Assert.assertEquals("NestedInnerClass", name)
+  }
+}