Location Services uses to
    communicate with your app:
</p>
<dl>
    <dt>
<code><a href="../../reference/com/google/android/gms/common/GooglePlayServicesClient.ConnectionCallbacks.html">ConnectionCallbacks</a></code>
    </dt>
    <dd>
        Specifies methods that Location Services calls when a location client is connected or
        disconnected.
    </dd>
    <dt>
<code><a href="../../reference/com/google/android/gms/common/GooglePlayServicesClient.OnConnectionFailedListener.html">OnConnectionFailedLi