Speed up dev options

- Put memory updates on background thread
 - Prevent update state from being called twice

Bug: 69000975
Test: Manual
Change-Id: I186bc25f6b74a5098b1737891efee3a6855dc996

src/com/android/settings/dashboard/DashboardFragment.java

@@ -87,9 +87,11 @@ public abstract class DashboardFragment extends SettingsPreferenceFragment
         // Set ComparisonCallback so we get better animation when list changes.
         getPreferenceManager().setPreferenceComparisonCallback(
                 new PreferenceManager.SimplePreferenceComparisonCallback());
-        // Upon rotation configuration change we need to update preference states before any
-        // editing dialog is recreated (that would happen before onResume is called).
-        updatePreferenceStates();
+        if (icicle != null) {
+            // Upon rotation configuration change we need to update preference states before any
+            // editing dialog is recreated (that would happen before onResume is called).
+            updatePreferenceStates();
+        }
     }
 
     @Override