GooglePlayServicesClient
class has been deprecated for some time. With latest GooglePlayServices release I believe they got rid of it completely.
However, demo project in AndroidStudio still uses old APIs, so it won’t compile 🙁
Essentially, for talking to GooglePlayServices, you should use GoogleApiClient now (as described here https://developer.android.com/google/auth/api-client.html)
Something like:
GoogleApiClient googleApiClient = new GoogleApiClient.Builder(this)
.addApi(Plus.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
................
googleApiClient.connect();