fix import symbol

Author: ahmedAlaaInstabug

example/ios/InstabugTests/PrivateViewApiTests.m

@@ -113,6 +113,9 @@ - (void)testGetFlutterViewOrigin_ValidView {
     UIView *mockView = [[UIView alloc] initWithFrame:CGRectMake(10, 20, 100, 100)];
 
     OCMStub([self.mockFlutterViewController view]).andReturn(mockView);
+    
+    UIWindow*  testWindow = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
+    [testWindow addSubview:mockView];
 
     CGPoint origin = [self.api getFlutterViewOrigin];