Have “sky_tool listen” start with a refresh so that iOS devices don’t wait on...

Have “sky_tool listen” start with a refresh so that iOS devices don’t wait on a black screen for the first filesystem change.

packages/flutter/lib/sky_tool

@@ -621,10 +621,6 @@ class StartListening(object):
         tempdir = tempfile.mkdtemp()
         currdir = os.getcwd()
         while True:
-            # Watch filesystem for changes
-            if not self.watch_dir(currdir):
-                return
-
             logging.info('Updating running Sky apps...')
 
             # Restart the app on Android.  Android does not currently restart using skyx files.
@@ -679,6 +675,10 @@ class StartListening(object):
             if IOSDevice.is_connected():
                 IOSDevice.copy_file(SKY_SHELL_APP_ID, os.path.join(tempdir, 'app.skyx'), 'Documents/app.skyx')
 
+            # Watch filesystem for changes
+            if not self.watch_dir(currdir):
+                return
+
 
 class StartTracing(object):
     def add_subparser(self, subparsers):