Telephony: Modify code to check that PUK code length is always 8.

As per 3GPP TS 31.101 Release 11 section 9.6, the number of digits
for UNBLOCK PIN (PUK) is always 8.

Change-Id: I4ea69fd8e2e8e96330d10a67b2d1f5a1859c1016
2 files changed