Fix crash when recreating SecuritySubSettings

Restoring instance state requires the items to be
there after onCreate.

Change-Id: Icef92bcbb168a0b4029a86b2b74235e344e2055e
Fixes: 27013071

src/com/android/settings/SecuritySettings.java

@@ -1027,6 +1027,7 @@ public class SecuritySettings extends SettingsPreferenceFragment
             super.onCreate(icicle);
             mLockPatternUtils = new LockPatternUtils(getContext());
             mDPM = getContext().getSystemService(DevicePolicyManager.class);
+            createPreferenceHierarchy();
         }
 
         @Override