Add trailing newlines to test files

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: simonrozsival

tests/Microsoft.Android.Sdk.TrimmableTypeMap.Tests/Generator/TypeMapAssemblyGeneratorTests.cs

@@ -504,4 +504,4 @@ public void ParseParameterTypes_UnterminatedSignature_ReturnsEmptyList ()
 	{
 		Assert.Empty (JniSignatureHelper.ParseParameterTypes ("("));
 	}
-}
+}

tests/Microsoft.Android.Sdk.TrimmableTypeMap.Tests/Generator/TypeMapModelBuilderTests.cs

@@ -919,4 +919,4 @@ public void Fixture_CustomView_HasTwoConstructorWrappers ()
 			Assert.Equal (2, proxy.UcoConstructors.Count);
 		}
 	}
-}
+}