Support SIM with 0~N contacts for test_ftu.

The strings of message are:

contacts.en-US.properties:simContacts-error     = Could not import contacts from SIM
contacts.en-US.properties:simContacts-imported3[zero]   = No contacts detected on SIM to import
contacts.en-US.properties:simContacts-imported3[one]    = Imported one contact
contacts.en-US.properties:simContacts-imported3[two]    = Imported {{n}} contacts
contacts.en-US.properties:simContacts-imported3[few]    = Imported {{n}} contacts
contacts.en-US.properties:simContacts-imported3[many]   = Imported {{n}} contacts
contacts.en-US.properties:simContacts-imported3[other]  = Imported {{n}} contacts