skip flaky test (#70881)

Skip flaky iOS XCUITest

dev/integration_tests/ios_host_app/FlutterUITests/FlutterUITests.m

@@ -43,6 +43,7 @@
     XCTAssertTrue([app.navigationBars[@"Flutter iOS Demos Home"] waitForExistenceWithTimeout:60.0]);
 }
 
+// TODO(dnfield): this test has become flaky, fix https://github.com/flutter/flutter/issues/70630 and re-enable.
 - (void)testFlutterViewWarm {
     XCUIApplication *app = [[XCUIApplication alloc] init];
     [app launch];

dev/integration_tests/ios_host_app/Host.xcodeproj/xcshareddata/xcschemes/Host.xcscheme

@@ -37,6 +37,11 @@
                BlueprintName = "FlutterUITests"
                ReferencedContainer = "container:Host.xcodeproj">
             </BuildableReference>
+            <SkippedTests>
+               <Test
+                  Identifier = "FlutterUITests/testFlutterViewWarm">
+               </Test>
+            </SkippedTests>
          </TestableReference>
       </Testables>
    </TestAction>