FDN: Don't crash when attempting to change the PIN2 without a SIM

Catch the absent SIM runtime exception and pop up a "No SIM" toast
instead

Change-Id: I16fb3db17a52efe25bcc5397845d1b099737a363
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_packages_services_Telephony into cm-11.0