existingUri

Given to the ringtone picker as a Uri. The Uri of the current ringtone, which will be used to show a checkmark next to the item for this Uri. If showing an item for "Default" (@see EXTRA_RINGTONE_SHOW_DEFAULT), this can also be one of System#DEFAULT_RINGTONE_URI, System#DEFAULT_NOTIFICATION_URI, or System#DEFAULT_ALARM_ALERT_URI to have the "Default" item checked.