Disable startNetworkScan tests with parameters.

Network scan tests with parameters are disabled because of vendors
failed to fully implement startNetworkScan in HAL 1.4, and GSM rat scan
with parameters will get REQUEST_NOT_SUPPORTED error from modem.

Test: VTS
Bug: 137298570
Change-Id: I99df8495c5f654cb1420b7da36d7f5128ce14dbc
diff --git a/radio/1.4/vts/functional/radio_hidl_hal_api.cpp b/radio/1.4/vts/functional/radio_hidl_hal_api.cpp
index 696c746..a05f0a7 100644
--- a/radio/1.4/vts/functional/radio_hidl_hal_api.cpp
+++ b/radio/1.4/vts/functional/radio_hidl_hal_api.cpp
@@ -151,6 +151,11 @@
 
 /*
  * Test IRadio.startNetworkScan() for the response returned.
+ *
+ * REQUEST_NOT_SUPPORTED is temporarily returned because of vendors failed to fully implement
+ * startNetworkScan in HAL @1.4 (see b/137298570 and b/135595082). Starting from @1.5, however,
+ * REQUEST_NOT_SUPPORTED will be disallowed for all tests. Modems have "GSM" rat scan need to
+ * support scanning requests combined with some parameters.
  */
 TEST_F(RadioHidlTest_v1_4, startNetworkScan) {
     serial = GetRandomSerialNumber();