Revert "Increase connection timeout further (#13415)" (#13417)

This reverts commit f40a9398.

dev/devicelab/bin/tasks/flutter_view_ios__start_up.dart

@@ -15,11 +15,8 @@ Future<Null> main() async {
   final Directory iosDirectory = dir(
     '${flutterDirectory.path}/examples/flutter_view/ios',
   );
-  final Stopwatch stopwatch = new Stopwatch()..start();
   await inDirectory(iosDirectory, () async {
     await exec('pod', <String>['install']);
   });
-
-  print('pod install executed in ${stopwatch.elapsed}');
   await task(createFlutterViewStartupTest());
 }

dev/devicelab/lib/framework/runner.dart

@@ -105,7 +105,7 @@ Future<VMIsolateRef> _connectToRunnerIsolate(int vmServicePort) async {
         throw 'not ready yet';
       return isolate;
     } catch (error) {
-      const Duration connectionTimeout = const Duration(seconds: 30);
+      const Duration connectionTimeout = const Duration(seconds: 4);
       if (new DateTime.now().difference(started) > connectionTimeout) {
         throw new TimeoutException(
           'Failed to connect to the task runner process',