Merge "Explictly disallow LTE_CA as a RAT type" am: 81fcfa6295

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1611604

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I6eee7a4b0960b767b6620c8b93dc252422c42f25
diff --git a/radio/1.6/types.hal b/radio/1.6/types.hal
index 238ffb4..a707045 100644
--- a/radio/1.6/types.hal
+++ b/radio/1.6/types.hal
@@ -697,8 +697,10 @@
     RegState regState;
 
     /**
-     * Indicates the available voice radio technology, valid values as
-     * defined by RadioTechnology.
+     * Indicates the available voice radio technology, valid values as defined by RadioTechnology,
+     * except LTE_CA, which is no longer a valid value on 1.5 or above. When the device is on
+     * carrier aggregation, vendor RIL service should properly report multiple PhysicalChannelConfig
+     * elements through IRadio::currentPhysicalChannelConfigs_1_6.
      */
     RadioTechnology rat;