Remove hard-coded "Runner" from iOS simulator logs filtering (#12306)

packages/flutter_tools/lib/src/ios/simulators.dart

diff --git a/packages/flutter_tools/lib/src/ios/simulators.dart b/packages/flutter_tools/lib/src/ios/simulators.dart
index 3376d75..4581b22 100644
--- a/packages/flutter_tools/lib/src/ios/simulators.dart
+++ b/packages/flutter_tools/lib/src/ios/simulators.dart
@@ -450,6 +450,7 @@
 
   @override
   DeviceLogReader getLogReader({ApplicationPackage app}) {
+    assert(app is IOSApp);
     _logReaders ??= <ApplicationPackage, _IOSSimulatorLogReader>{};
     return _logReaders.putIfAbsent(app, () => new _IOSSimulatorLogReader(this, app));
   }
@@ -519,7 +520,7 @@
 class _IOSSimulatorLogReader extends DeviceLogReader {
   String _appName;
 
-  _IOSSimulatorLogReader(this.device, ApplicationPackage app) {
+  _IOSSimulatorLogReader(this.device, IOSApp app) {
     _linesController = new StreamController<String>.broadcast(
       onListen: _start,
       onCancel: _stop
@@ -583,7 +584,7 @@
       final String content = match.group(4);
 
       // Filter out non-Flutter originated noise from the engine.
-      if (category != 'Runner')
+      if (_appName != null && category != _appName)
         return null;
 
       if (tag != null && tag != '(Flutter)')