wpa_supplicant: Add P2P |Iface| & |Network| classes

Add the new P2P iface/network HIDL interface implementations. This CL
only implements methods from the base class
|ISupplicantIface|/|ISupplicantNetwork| to the p2p classes.

Bug: 31497295
Test: Compiles
Change-Id: Ie0876f16ef58fe73f0eabd302c964523de5d5041
diff --git a/wpa_supplicant/Android.mk b/wpa_supplicant/Android.mk
index 019bf9f..1a25d08 100644
--- a/wpa_supplicant/Android.mk
+++ b/wpa_supplicant/Android.mk
@@ -1669,6 +1669,8 @@
 LOCAL_SRC_FILES := \
     hidl/hidl.cpp \
     hidl/hidl_manager.cpp \
+    hidl/p2p_iface.cpp \
+    hidl/p2p_network.cpp \
     hidl/sta_iface.cpp \
     hidl/sta_network.cpp \
     hidl/supplicant.cpp