- Install any root file manager (ex. Root Explorer from Play Store)
- Backup safety files SecContacts.apk, SecContacts.odex in /system/app to SD card or internal storage (or where you want), before you delete theme.
- Download 1 file attached below, copy to /system/app (you must accept Grant button in SuperSU when being asked)
- Set permission 644 (rw-r-r--) for this file, then reboot. Done.
Tell me if ok. Sorry for my bad English.