[VTS][NAN] Restore NAN test: configure for device support

Restore NAN test and use configuration which determines test
result based on whether or not the platform supports NAN.

Bug: 63131342
Test: NAN-supporting devices: pass (the NAN tests)
Test: Non-NAN-supporting device: pass
Change-Id: I6600abc531d4eb1dea6c501f6a39ef37051cb923
diff --git a/wifi/1.0/vts/functional/VtsHalWifiV1_0TargetTest.cpp b/wifi/1.0/vts/functional/VtsHalWifiV1_0TargetTest.cpp
index d8ec1a7..beac039 100644
--- a/wifi/1.0/vts/functional/VtsHalWifiV1_0TargetTest.cpp
+++ b/wifi/1.0/vts/functional/VtsHalWifiV1_0TargetTest.cpp
@@ -20,8 +20,10 @@
 
 #include "wifi_hidl_test_utils.h"
 
+WifiHidlEnvironment* gEnv;
+
 int main(int argc, char** argv) {
-    WifiHidlEnvironment* gEnv = new WifiHidlEnvironment();
+    gEnv = new WifiHidlEnvironment();
     ::testing::AddGlobalTestEnvironment(gEnv);
     ::testing::InitGoogleTest(&argc, argv);
     int status = gEnv->initFromOptions(argc, argv);