[5.4] Fix headers are not sent correctly in com_media api controller (joomla#45150)

Author: AkameOuO

administrator/components/com_media/src/Controller/ApiController.php

@@ -308,7 +308,10 @@ private function sendResponse($data = null, int $responseCode = 200)
         $this->app->setHeader('Content-Type', 'application/json');
 
         // Set the status code for the response
-        http_response_code($responseCode);
+        $this->app->setHeader('status', $responseCode);
+
+        // Send headers before sending the data
+        $this->app->sendHeaders();
 
         // Send the data
         echo new JsonResponse($data);