fix(rtn-push-notification): wrong override signature (#14360)

Author: HuiSF

packages/rtn-push-notification/android/src/main/kotlin/com/amazonaws/amplify/rtnpushnotification/PushNotificationHeadlessTaskService.kt

@@ -14,7 +14,7 @@ class PushNotificationHeadlessTaskService : HeadlessJsTaskService() {
     private val defaultTimeout: Long = 10000 // 10 seconds
 
     @InternalAmplifyApi
-    override fun getTaskConfig(intent: Intent): HeadlessJsTaskConfig? {
+    override fun getTaskConfig(intent: Intent?): HeadlessJsTaskConfig? {
         return NotificationPayload.fromIntent(intent)?.let {
             HeadlessJsTaskConfig(
                 HEADLESS_TASK_KEY, it.toWritableMap(), defaultTimeout, true