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/scripts/start-flipper-server-dev.tsx

@@ -64,6 +64,11 @@ const argv = yargs
       type: 'boolean',
       default: true,
     },
+    tcp: {
+      describe: 'Enable TCP connections on flipper-server.',
+      type: 'boolean',
+      default: true,
+    },
     channel: {
       description: 'Release channel for the build',
       choices: ['stable', 'insiders'],
@@ -131,7 +136,7 @@ let startCount = 0;
 async function restartServer() {
   try {
     await compileServerMain(true);
-    await launchServer(true, argv.open && ++startCount === 1); // only open on the first time
+    await launchServer(true, argv.open && ++startCount === 1, argv.tcp); // only open on the first time
   } catch (e) {
     console.error(
       chalk.red(