Startup hooks don't seem to work. Refs: * https://github.com/dotnet/android/pull/10670 * https://github.com/dotnet/runtime/blob/242f7b23752599f22157268de41fee91cb97ef6c/docs/design/features/host-startup-hook.md * https://github.com/rolfbjarne/xamarin-macios/commit/a7ba4922b05d233f54e18e1ae5a0038a3b3cc568 *