libril: some blobs don't support CELL_INFO_LIST commands

RIL blobs that don't support CELL_INFO_LIST needs this ifndefs,
or rild keeps crashing with segfaults.

Change-Id: Ifcd717740db812ce9a2371fcb20ed61d07efffe1

Conflicts:
	libril/ril.cpp
	libril/ril_commands.h
	libril/ril_unsol_commands.h