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
SamsungQualcommRIL: fix my derp.

* don't code when you are tired
Change-Id: Ic02bd9cbbe96b674d7c93a2c5807563ddf46199a