[DPP] Add "Not supported" failure code for DPP.

Add "Not supported" failure code for DPP.

Bug: 122851551
Test: atest DppManagerTest
Test: act.py -c ../WifiDppConfig.json -tc WifiDppTest
Change-Id: I3b0e9b0726387696c476b35f7e83ea9f0a921432
diff --git a/wifi/supplicant/1.2/types.hal b/wifi/supplicant/1.2/types.hal
index 576b4f5..eaf2546 100644
--- a/wifi/supplicant/1.2/types.hal
+++ b/wifi/supplicant/1.2/types.hal
@@ -60,4 +60,5 @@
     BUSY,
     TIMEOUT,
     FAILURE,
+    NOT_SUPPORTED,
 };