Changes SetupRedactionInterstitial to be an optional step

We no longer need this to be in inside the setup flow when setting up
the lock screen. Move this class to be used as an optional step if a
lock screen is added.

bug:23893721
Change-Id: I15478e0f0d8d8771cbdce6ccf0f508cbd5dd4f36

src/com/android/settings/SetupChooseLockPattern.java

@@ -105,11 +105,7 @@ public class SetupChooseLockPattern extends ChooseLockPattern {
 
         @Override
         protected Intent getRedactionInterstitialIntent(Context context) {
-            Intent intent = SetupRedactionInterstitial.createStartIntent(context);
-            if (intent != null) {
-                SetupWizardUtils.copySetupExtras(getActivity().getIntent(), intent);
-            }
-            return intent;
+            return null;
         }
 
         @Override