[One .NET] Don't always preserve Android.Runtime.ConstructorBuilder (#…

…5364)

Context: #5167

The `Android.Runtime.ConstructorBuilder` type is not accessed
by reflection, and does not need to be fully preserved by the linker.

src/Microsoft.Android.Sdk.ILLink/PreserveLists/Mono.Android.xml

@@ -3,7 +3,6 @@
 	<assembly fullname="Mono.Android">
 		<type fullname="Android.Runtime.AndroidEnvironment" />
 		<type fullname="Android.Runtime.AnnotationAttribute" />
-		<type fullname="Android.Runtime.ConstructorBuilder" />
 		<type fullname="Android.Runtime.GeneratedDummyHost" />
 		<type fullname="Android.Runtime.GeneratedEnumAttribute" />
 		<type fullname="Android.Runtime.IJavaObject" />