Add support for LTE CarrierAgregation

Note this may be redesigned in O to better handle the
various bitrate/channel combinations in a sane way.

bug:27360321
Change-Id: I36a548b3229bf344ac2e4b714d8dc1dfa47af064
diff --git a/include/telephony/ril.h b/include/telephony/ril.h
index 736f487..4edc20f 100644
--- a/include/telephony/ril.h
+++ b/include/telephony/ril.h
@@ -246,7 +246,8 @@
     RADIO_TECH_HSPAP = 15, // HSPA+
     RADIO_TECH_GSM = 16, // Only supports voice
     RADIO_TECH_TD_SCDMA = 17,
-    RADIO_TECH_IWLAN = 18
+    RADIO_TECH_IWLAN = 18,
+    RADIO_TECH_LTE_CA = 19
 } RIL_RadioTechnology;
 
 typedef enum {
@@ -268,6 +269,7 @@
     RAF_HSPAP = (1 << RADIO_TECH_HSPAP),
     RAF_GSM = (1 << RADIO_TECH_GSM),
     RAF_TD_SCDMA = (1 << RADIO_TECH_TD_SCDMA),
+    RAF_LTE_CA = (1 << RADIO_TECH_LTE_CA)
 } RIL_RadioAccessFamily;
 
 typedef enum {