Avoid wrongly reported SIM PIN mismatch.

(At least) Qualcomm RILs report SIM unlock success as result=0,
attemptsRemaining=0. As reportSimUnlocked() causes showDefaultMessage()
to be called (via reportSimUnlocked -> handleSimStateChange ->
onSimStateChanged -> resetState -> showDefaultMessage), which accesses
mRemainingAttempts to determine the message to show, set
mRemainingAttempts before calling reportSimUnlocked().

This resets that code sequence back to AOSP; it got broken in commit
18281968.

Change-Id: Icf7b15f1bf55bb32c8b58bd6c77109971cbc463b