The key to an extra Android.Runtime.JavaList of Java.Lang.Strings that contains the search urls to use, if available, for the recognition alternates provided in RecognizerResultsIntent.ExtraVoiceSearchResultStrings. This list should always be the same size as the one provided in RecognizerResultsIntent.ExtraVoiceSearchResultStrings - if a result cannot provide a search url, that entry in this ArrayList should be null, and the implementor of RecognizerResultsIntent.ActionVoiceSearchResults should execute a search of its own choosing, based on the recognition result string.