Telephony: Implementation of IWLAN.

- Introduce IWLAN RAT in ril.h

Change-Id: Iaea12214b8333c6b6a56879c4d3b9417e3c24082
diff --git a/include/telephony/ril.h b/include/telephony/ril.h
index 62521f4..a5079f4 100644
--- a/include/telephony/ril.h
+++ b/include/telephony/ril.h
@@ -162,7 +162,8 @@
     RADIO_TECH_LTE = 14,
     RADIO_TECH_HSPAP = 15, // HSPA+
     RADIO_TECH_GSM = 16, // Only supports voice
-    RADIO_TECH_TD_SCDMA = 17
+    RADIO_TECH_TD_SCDMA = 17,
+    RADIO_TECH_IWLAN = 18
 } RIL_RadioTechnology;
 
 typedef enum {