[DPP] Add DPP key management capability API

Add DPP key management capability API.

Bug: 112197021
Test: atest SupplicantStaIfaceHalTest
Change-Id: Ie92ac574aead59bed7ac51f599ca1eb36ac5251f
diff --git a/wifi/supplicant/1.2/ISupplicantStaNetwork.hal b/wifi/supplicant/1.2/ISupplicantStaNetwork.hal
index 6fd0d51..6c356a4 100644
--- a/wifi/supplicant/1.2/ISupplicantStaNetwork.hal
+++ b/wifi/supplicant/1.2/ISupplicantStaNetwork.hal
@@ -36,6 +36,9 @@
 
         /** Enhacned Open (OWE) Key management */
         OWE = 1 << 22,
+
+        /** Easy Connect (DPP) Key management */
+        DPP = 1 << 23,
     };
 
     /** Possble mask of values for PairwiseCipher param. */