Fixed unit test

Author: dellis1972

src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/Tasks/CheckGoogleSdkRequirementsTests.cs

@@ -92,8 +92,8 @@ public void CheckManifestMinSdkLowerThanTargetSdk ()
 				ManifestFile = CreateManiestFile (28, 27),
 			};
 			Assert.False (task.Execute (), "Task should have failed.");
-			Assert.AreEqual (1, errors.Count, "There should be 1 error reported.");
-			Assert.AreEqual (0, warnings.Count, "There should be 0 warnings reported.");
+			Assert.AreEqual (0, errors.Count, "There should be 0 error reported.");
+			Assert.AreEqual (1, warnings.Count, "There should be 1 warnings reported.");
 		}
 	}
 }