Try the activity starter workaround
You already asked here Failed resolution of : lcom/google/android/gms/safetynet/safetynet; - #20 by admobbangla603
Did you try
Failed resolution of : lcom/google/android/gms/safetynet/safetynet; - #19 by vknow360
Please stay in that thread and do not mix topics
Taifun