feat(recording): Add unexpected-request error

modules/recording/recordingConstants.js

@@ -3,6 +3,7 @@ export default {
         BUSY: 'busy',
         ERROR: 'error',
         RESOURCE_CONSTRAINT: 'resource-constraint',
+        UNEXPECTED_REQUEST: 'unexpected-request',
         SERVICE_UNAVAILABLE: 'service-unavailable'
     },
     mode: {