Migrate HeadlessJsTaskEventListener to Kotlin (#48103)

Summary:
Migrate `HeadlessJsTaskEventListener` to Kotlin

## Changelog:

[INTERNAL] - Migrate `HeadlessJsTaskEventListener` to Kotlin

Pull Request resolved: #48103

Test Plan:
```bash
yarn test-android
```

Reviewed By: javache

Differential Revision: D66814483

Pulled By: cortinico

fbshipit-source-id: 5aef4ce020f97164845e3e0d53a107c7e407a6aa

Author: mateoguzmana

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/jstasks/HeadlessJsTaskEventListener.java renamed to packages/react-native/ReactAndroid/src/main/java/com/facebook/react/jstasks/HeadlessJsTaskEventListener.kt

@@ -5,7 +5,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-package com.facebook.react.jstasks;
+package com.facebook.react.jstasks
 
 /** Listener interface for task lifecycle events. */
 public interface HeadlessJsTaskEventListener {
@@ -15,12 +15,12 @@ public interface HeadlessJsTaskEventListener {
    *
    * @param taskId the unique identifier of this task instance
    */
-  void onHeadlessJsTaskStart(int taskId);
+  public fun onHeadlessJsTaskStart(taskId: Int)
 
   /**
    * Called when a JS task finishes (i.e. when {@link
    * HeadlessJsTaskSupportModule#notifyTaskFinished} is called, or when it times out), on the UI
    * thread.
    */
-  void onHeadlessJsTaskFinish(int taskId);
+  public fun onHeadlessJsTaskFinish(taskId: Int)
 }