Update IosUnitTests to use iPhone 11 simulator (flutter/engine#30090)

engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterViewControllerTest.mm

@@ -357,9 +357,10 @@ typedef enum UIAccessibilityContrast : NSInteger {
                                                                                 nibName:nil
                                                                                  bundle:nil];
   mockEngine.viewController = viewController;
-  [viewController updateViewportMetrics];
   flutter::ViewportMetrics viewportMetrics;
-  OCMVerify([mockEngine updateViewportMetrics:viewportMetrics]);
+  OCMExpect([mockEngine updateViewportMetrics:viewportMetrics]).ignoringNonObjectArgs();
+  [viewController updateViewportMetrics];
+  OCMVerifyAll(mockEngine);
 }
 
 - (void)testViewDidLoadDoesntInvokeEngineWhenNotTheViewController {

engine/src/flutter/testing/ios/IosUnitTests/README.md

@@ -15,9 +15,9 @@ After the `ios_test_flutter` target is built you can also run the tests inside
 of Xcode with `testing/ios/IosUnitTests/IosUnitTests.xcodeproj`.
 
 When you load the test project [IosUnitTests.xcodeproj](IosUnitTests.xcodeproj)
-into XCode after running `run_tests.py`, only a few basic tests will appear
-initially. You have to run the test suite once in XCode for the rest to appear.
-Select "iPhone 8" as the device, and press `command-u` to start all the tests
+into Xcode after running `run_tests.py`, only a few basic tests will appear
+initially. You have to run the test suite once in Xcode for the rest to appear.
+Select "iPhone 11" as the device, and press `command-u` to start all the tests
 running. Once the tests are done running, the tests that ran will appear in the
 sidebar, and you can pick the specific one you want to debug/run.
 

engine/src/flutter/testing/run_tests.py

@@ -387,7 +387,7 @@ def RunObjcTests(ios_variant='ios_debug_sim_unopt', test_filter=None):
     'xcodebuild '
     '-sdk iphonesimulator '
     '-scheme IosUnitTests '
-    "-destination platform='iOS Simulator,name=iPhone 8' "
+    "-destination platform='iOS Simulator,name=iPhone 11' "
     'test '
     'FLUTTER_ENGINE=' + ios_variant
   ]