SamsungExynos3RIL: don't send IccStatus notification on CDMA devices

This causes the RIL to send erroneous GET_SIM_STATUS events that are
of course failing as CDMA devices lack a SIM card. This is causing a
persistent wakelock and quickly draining the battery.

Change-Id: Ic94ff85b63b21b66d66a757127585806c41a3ffa