Allows an application to query whether a service is currently the default service to handle a card emulation category.

Note that if CardEmulation.GetSelectionModeForCategory(string) returns CardEmulation.SelectionModeAlwaysAsk or CardEmulation.SelectionModeAskIfConflict, this method will always return false. That is because in these selection modes a default can't be set at the category level. For categories where the selection mode is CardEmulation.SelectionModeAlwaysAsk or CardEmulation.SelectionModeAskIfConflict, use CardEmulation.IsDefaultServiceForAid(Android.Content.ComponentName, System.String) to determine whether a service is the default for a specific AID.

[Android Documentation]