Don't throw on timeouts during client connection.

Summary: Timeout exceptions while connection to new clients where rethrown but catched nowhere. Probably this warning should be handled more gracefully, but this at least moves it to warn rather than spawning our monitoring on transient issues

Reviewed By: passy, antonk52

Differential Revision: D47665050

fbshipit-source-id: ad51808d12e9f4de318d4426933ecb3787839b7c

desktop/flipper-ui-core/src/dispatcher/flipperServer.tsx

@@ -366,7 +366,7 @@ export async function handleClientConnected(
       );
       return;
     }
-    throw e;
+    console.warn(`[conn] Failed to handle client connected: ${e}`);
   }
 }