SetupWizard. Let each page optionally handle deferred actions on finish

Change-Id: I040d8dd472cc73ee034b3dbe8177a5b2e3314918

src/com/cyanogenmod/setupwizard/setup/SetupPage.java

@@ -69,6 +69,9 @@ public abstract class SetupPage implements Page {
         return false;
     }
 
+    @Override
+    public void onFinishSetup() {}
+
     @Override
     public void doLoadAction(Activity context, int action) {
         if (context == null || context.isFinishing()) { return; }