fix simulator bug: downsampling is disabled by default on iPhone 6/6+/7/8 plus simulator

Runtime/Plugins/platform/ios/UIWidgetsDevice.mm

             switch ((int)[[UIScreen mainScreen] nativeBounds].size.height) {
                     //iPhone 5 or 5S or 5C
                 case 1136:
-                    _deviceName = @"iPhone 5";
+                    _deviceName = @"iPhone 5 Simulator";
-                    _deviceName = @"iPhone 6";
+                    _deviceName = @"iPhone 6 Simulator";
-                    _deviceName = @"iPhone 6 Plus";
+                    _deviceName = @"iPhone 6 Plus Simulator";
-                    _deviceName = @"iPhone 6 Plus";
+                    _deviceName = @"iPhone 6 Plus Simulator";
-                    _deviceName = @"iPhone X";
+                    _deviceName = @"iPhone X Simulator";
-                    _deviceName = @"iPhone XS Max";
+                    _deviceName = @"iPhone XS Max Simulator";
-                    _deviceName = @"iPhone XR";
+                    _deviceName = @"iPhone XR Simulator";
-                    _deviceName = @"Unknown";
+                    _deviceName = @"Unknown Simulator";
                     break;
             }
         }