feat(http_api_routes): add new endpoint for retrieving licenses

tests/backend/fixtures/http_api_routes.json

@@ -24,6 +24,10 @@
       "method": "GET",
       "path": "/api/v1/app/info"
     },
+    {
+      "method": "GET",
+      "path": "/api/v1/licenses"
+    },
     {
       "method": "POST",
       "path": "/api/v1/app/integrity/acknowledge"