ENGCOM-5125: Fixed issue magento#22875 Billing Agreements page title need to be improved magento#22876

 - Merge Pull Request magento#22876 from amitvishvakarma/magento2:2.3-developPr22875
 - Merged commits:
   1. 3fb72ae
   2. ed84c8d

Author: magento-engcom-team

app/code/Magento/Paypal/Controller/Billing/Agreement/Index.php

@@ -6,7 +6,12 @@
  */
 namespace Magento\Paypal\Controller\Billing\Agreement;
 
-class Index extends \Magento\Paypal\Controller\Billing\Agreement
+use Magento\Framework\App\Action\HttpGetActionInterface as HttpGetActionInterface;
+
+/**
+ * Index Controller.
+ */
+class Index extends \Magento\Paypal\Controller\Billing\Agreement implements HttpGetActionInterface
 {
     /**
      * View billing agreements