Initialize the xmpp connection config in a background thread.
On android > 3.x network operations on the main thread crash the application.
This move the dns request made by the ConnectionConfiguration in another
thread by lazily initializing the XMPPConnection
package net.java.otr4j;
public class OtrException extends Exception {
private static final long serialVersionUID = 1L;
public OtrException(Exception e){
super(e);
}
}