Fix crash on back

[M66B]

In expert mode, I clicked on the pencil icon at left (of an item in the list of apps). And when the new screen opens then I click back (on the screen, hardware button works fine). This causes the GUI to crash.
I am using LiquidSmooth (4.2.2) build#2 ROM on HTC Explorer.

E/AndroidRuntime: FATAL EXCEPTION: main E/AndroidRuntime: java.lang.NoClassDefFoundError: android.support.v4.app.NavUtils E/AndroidRuntime: at biz.bokhorst.xprivacy.ActivityApp.onOptionsItemSelected(ActivityApp.java:151) E/AndroidRuntime: at android.app.Activity.onMenuItemSelected(Activity.java:2559) E/AndroidRuntime: at com.android.internal.widget.ActionBarView$3.onClick(ActionBarView.java:167) E/AndroidRuntime: at android.view.View.performClick(View.java:4204) E/AndroidRuntime: at android.view.View$PerformClick.run(View.java:17354) E/AndroidRuntime: at android.os.Handler.handleCallback(Handler.java:725) E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:92) E/AndroidRuntime: at android.os.Looper.loop(Looper.java:137) E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5227) E/AndroidRuntime: at java.lang.reflect.Method.invokeNative(Native Method) E/AndroidRuntime: at java.lang.reflect.Method.invoke(Method.java:511) E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795) E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562) E/AndroidRuntime: at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:110) E/AndroidRuntime: at dalvik.system.NativeStart.main(Native Method) W/ActivityManager: Force finishing activity biz.bokhorst.xprivacy/.ActivityApp

[M66B]

http://stackoverflow.com/questions/16596969/libraries-do-not-get-added-to-apk-anymore-after-upgrade-to-adt-22