update google play services to 10.0.0 & build tools to 25
update google play services to 10.0.0 & build tools to 25

StepicOrg/stepic-android,StepicOrg/stepik-android,StepicOrg/stepik-android,StepicOrg/stepic-android,StepicOrg/stepik-android,StepicOrg/stepic-android