Disable preference list animation for Internet Settings

Bug: 173207801
Test: manual test
make RunSettingsRoboTests ROBOTEST_FILTER=NetworkProviderSettingsTest

Change-Id: I774babec60cbb297b8ad0b24141eb57f082d2a5a

src/com/android/settings/network/NetworkProviderSettings.java

@@ -416,9 +416,14 @@ public class NetworkProviderSettings extends RestrictedSettingsFragment
 
     @Override
     public void onResume() {
-        final Activity activity = getActivity();
         super.onResume();
 
+        // Disable the animation of the preference list
+        final RecyclerView prefListView = getListView();
+        if (prefListView != null) {
+            prefListView.setItemAnimator(null);
+        }
+
         // Because RestrictedSettingsFragment's onResume potentially requests authorization,
         // which changes the restriction state, recalculate it.
         final boolean alreadyImmutablyRestricted = mIsRestricted;