Add the new RIL requests to start/stop network scan

The CL defines the RIL API including the methods and structs which will
be used start and stop the network scan.

Test: Telephony Sanity Test
Bug: 30954762

Change-Id: I18462bf4aa5e8a9497d5eb214d905e4e7c827a04
(cherry picked from commit b187e9f95e52f4a10a656a56c8a1a3a8722bb029)
diff --git a/radio/1.1/IRadioResponse.hal b/radio/1.1/IRadioResponse.hal
index 7727ef1..7415252 100644
--- a/radio/1.1/IRadioResponse.hal
+++ b/radio/1.1/IRadioResponse.hal
@@ -46,4 +46,29 @@
      */
     oneway setSimCardPowerResponse_1_1(RadioResponseInfo info);
 
+    /**
+     * @param info Response info struct containing response type, serial no. and error
+     *
+     * Valid errors returned:
+     *   RadioError:NONE
+     *   RadioError:RADIO_NOT_AVAILABLE
+     *   RadioError:OPERATION_NOT_ALLOWED
+     *   RadioError:DEVICE_IN_USE
+     *   RadioError:INTERNAL_ERR
+     *   RadioError:NO_MEMORY
+     *   RadioError:MODEM_ERR
+     *   RadioError:INVALID_ARGUMENTS
+     *   RadioError:REQUEST_NOT_SUPPORTED
+     */
+    oneway startNetworkScanResponse(RadioResponseInfo info);
+
+    /**
+     * @param info Response info struct containing response type, serial no. and error
+     *
+     * Valid errors returned:
+     *   RadioError:NONE
+     *   RadioError:INTERNAL_ERR
+     *   RadioError:MODEM_ERR
+     */
+    oneway stopNetworkScanResponse(RadioResponseInfo info);
 };