telephony: do only run getImsRegistrationState for RIL version >= 8
old libraries like those from MR0 don't support this and sending this command causes endless wakelocks

Change-Id: If54e3a38ff1beece179615303218740000b6654b
telephony: do only run setCellInfoListRate for RIL version >= 8
old libraries like those from MR0 don't support this and sending this command causes endless wakelocks

Change-Id: Ia47d366f70841eb9910079e105add407f58e7555