Call the ALooper_pollAll to retrieve events and callback the application

Property definitions

android :: native_app_glue $ App :: poll_looper
	# Call the `ALooper_pollAll` to retrieve events and callback the application
	fun poll_looper(timeout_ms: Int) import handle_looper_event `{
		int ident;
		int event;
		void* source;
		while ((ident=ALooper_pollAll(timeout_ms, NULL, &event, &source)) >= 0) {
			App_handle_looper_event(self, ident, event, source);
		}
	`}
lib/android/native_app_glue.nit:233,2--241,3