ClassCastException when restoring PublicizeButtonPrefsFragment

[khaykov]

Steps to reproduce this issue are identical to #6660
This two issues are masking each other.

Fatal Exception: java.lang.RuntimeException: Unable to start activity ComponentInfo{org.wordpress.android/org.wordpress.android.ui.publicize.PublicizeListActivity}: java.lang.ClassCastException: java.util.ArrayList cannot be cast to org.wordpress.android.widgets.WPPrefView$PrefListItems
       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2351)
       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2403)
       at android.app.ActivityThread.access$600(ActivityThread.java:165)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373)
       at android.os.Handler.dispatchMessage(Handler.java:107)
       at android.os.Looper.loop(Looper.java:194)
       at android.app.ActivityThread.main(ActivityThread.java:5370)
       at java.lang.reflect.Method.invokeNative(Method.java)
       at java.lang.reflect.Method.invoke(Method.java:525)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
       at dalvik.system.NativeStart.main(NativeStart.java)
Caused by java.lang.ClassCastException: java.util.ArrayList cannot be cast to org.wordpress.android.widgets.WPPrefView$PrefListItems
       at org.wordpress.android.widgets.WPPrefView.onRestoreInstanceState(WPPrefView.java:241)
       at android.view.View.dispatchRestoreInstanceState(View.java:12221)
       at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2680)
       at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2686)
       at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2686)
       at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2686)
       at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2686)
       at android.view.View.restoreHierarchyState(View.java:12199)
       at android.app.Fragment.restoreViewState(Fragment.java:612)
       at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:905)
       at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1057)
       at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1039)
       at android.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:1840)
       at android.app.Activity.performCreate(Activity.java:5125)
       at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1150)
       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2315)
       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2403)
       at android.app.ActivityThread.access$600(ActivityThread.java:165)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373)
       at android.os.Handler.dispatchMessage(Handler.java:107)
       at android.os.Looper.loop(Looper.java:194)
       at android.app.ActivityThread.main(ActivityThread.java:5370)
       at java.lang.reflect.Method.invokeNative(Method.java)
       at java.lang.reflect.Method.invoke(Method.java:525)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
       at dalvik.system.NativeStart.main(NativeStart.java)