fix travis for android 23 again
fix travis for android 23 again

carlospontual/card.io-Android-source,poovarasanvasudevan/card.io-Android-source,carlospontual/card.io-Android-source,lkorth/card.io-Android-source,poovarasanvasudevan/card.io-Android-source,white-sky/card.io-Android-source,white-sky/card.io-Android-source,carlospontual/card.io-Android-source,carlospontual/card.io-Android-source,poovarasanvasudevan/card.io-Android-source,lkorth/card.io-Android-source,white-sky/card.io-Android-source,lkorth/card.io-Android-source,carlospontual/card.io-Android-source,lkorth/card.io-Android-source,lkorth/card.io-Android-source,poovarasanvasudevan/card.io-Android-source,white-sky/card.io-Android-source