UDS/TCP options

Summary:
Provide an option to enable/disable TCP connections on flipper-server.

The only change at this stage is that Flipper Desktop will use UDS to connect to flipper-server.

Reviewed By: passy

Differential Revision: D37519656

fbshipit-source-id: 3d02084666fde532ec76134edf8cf6a231060a48

desktop/flipper-frontend-core/src/client/FlipperServerClient.tsx

@@ -28,6 +28,14 @@ export function createFlipperServer(
   host: string,
   port: number,
   onStateChange: (state: FlipperServerState) => void,
+): Promise<FlipperServer> {
+  const socket = new ReconnectingWebSocket(`ws://${host}:${port}`);
+  return createFlipperServerWithSocket(socket, onStateChange);
+}
+
+export function createFlipperServerWithSocket(
+  socket: ReconnectingWebSocket,
+  onStateChange: (state: FlipperServerState) => void,
 ): Promise<FlipperServer> {
   onStateChange(FlipperServerState.CONNECTING);
 
@@ -40,7 +48,6 @@ export function createFlipperServer(
 
     const eventEmitter = new EventEmitter();
 
-    const socket = new ReconnectingWebSocket(`ws://${host}:${port}`);
     const pendingRequests: Map<
       number,
       {