Exit to Settings when removing the only account for a type.

Skip over the ManageAccounts screen which shows the list of accounts
for a particular type, if there are no accounts there.

Bug: 6630827

Also fix text alignment in top-level of settings.

Change-Id: Icd446babc131e7052fc9e95514214fffe6e6e113

src/com/android/settings/accounts/AuthenticatorHelper.java

@@ -23,7 +23,6 @@ import android.content.Context;
 import android.content.pm.PackageManager;
 import android.content.res.Resources;
 import android.graphics.drawable.Drawable;
-import android.graphics.drawable.ScaleDrawable;
 import android.util.Log;
 
 import java.util.ArrayList;
@@ -32,7 +31,7 @@ import java.util.Map;
 
 public class AuthenticatorHelper {
 
-    private static final String TAG = "AccountTypesHelper";
+    private static final String TAG = "AuthenticatorHelper";
     private Map<String, AuthenticatorDescription> mTypeToAuthDescription
             = new HashMap<String, AuthenticatorDescription>();
     private AuthenticatorDescription[] mAuthDescs;

src/com/android/settings/accounts/ManageAccountsSettings.java

@@ -333,6 +333,11 @@ public class ManageAccountsSettings extends AccountPreferenceBase
         }
         if (mAccountType != null && mFirstAccount != null) {
             addAuthenticatorSettings();
+        } else {
+            // There's no account, reset to top-level of settings
+            Intent settingsTop = new Intent(android.provider.Settings.ACTION_SETTINGS);
+            settingsTop.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
+            getActivity().startActivity(settingsTop);
         }
         onSyncStateUpdated();
     }