Receive forwarded number from Modem

Adds forwarded number to Call information

Update 1.6 HAL:
- Added Call
- Added getCurrentCalls_1_6
- Added getCurrentCallsResponse_1_6

Test: Build pass.
Bug: 29063067

Change-Id: I8e43439e5638b7820d156d8fc6fe963cf1edf6f0
diff --git a/radio/1.6/IRadio.hal b/radio/1.6/IRadio.hal
index 2c8ac5e..929c624 100644
--- a/radio/1.6/IRadio.hal
+++ b/radio/1.6/IRadio.hal
@@ -406,4 +406,13 @@
      * Response function is IRadioResponse.getDataRegistrationStateResponse_1_6()
      */
     oneway getDataRegistrationState_1_6(int32_t serial);
+
+    /**
+     * Requests current call list
+     *
+     * @param serial Serial number of request.
+     *
+     * Response function is IRadioResponse.getCurrentCallsResponse_1_6()
+     */
+    oneway getCurrentCalls_1_6(int32_t serial);
 };