removed unneeded xpp include (Android does already provide xpp)
removed unneeded xpp include (Android does already provide xpp)

lovecc0923/asmack,ZachGoldberg/asmack,tks-dp/asmack,Flowdalic/asmack,tks-dp/asmack,lizhangqu/asmack,chuangWu/asmack,lizhangqu/asmack,chuangWu/asmack,lovecc0923/asmack,Flowdalic/asmack,ZachGoldberg/asmack