title: GoogleSignInAccount getPhotoUrl() return null
body: <p>Trying to get photo from signed in profile. But always return null. Name and email return values, trouble only with photo.</p>
  
  <pre><code>GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
              .requestProfile()
              .requestEmail()
              .build();
  mGoogleApiClient = new GoogleApiClient.Builder(StartActivity.this)
              .enableAutoManage(StartActivity.this, StartActivity.this)
              .addApi(Auth.GOOGLE_SIGN_IN_API, gso)   
              .build();
  acct = gResult.getSignInAccount();
  String name = acct.getDisplayName(); //okay, value != null
  String email = acct.getEmail(); //okay, value != null
  Uri photoUri = acct.getPhotoUrl() //not okay, value == null
  </code></pre>
  
  <p>Why does it happen so? Account signed, email and name got, but photo always fail. </p>