Voice search doesn’t work for now, but everything else does, give it a go!
Rename the APK to GoogleQuickSearchBox.apk
Go to System/App and rename the original GoogleQuickSearchBox.apk to something else (Or delete it)
Copy in the GoogleQuickSearchBox.apk the one you renamed from (Velvet-theos0o.apk)
Set the permissions, to the /System/App/GoogleQuickSearchBox.apk to RW-R–R–
Reboot and it should work