wifi(implementation): Unit tests for V1 & V2 iface combos

Unit tests for all the iface combos supported in V1 (2016 devices) & V2
(2017 devices).

Bug: 68775880
Test: ./hardware/interfaces/wifi/1.2/default/tests/runtests.sh
Change-Id: I1049176aabdf936d442d022b5915129010ce7387
diff --git a/wifi/1.2/default/Android.mk b/wifi/1.2/default/Android.mk
index 2205e4e..1207320 100644
--- a/wifi/1.2/default/Android.mk
+++ b/wifi/1.2/default/Android.mk
@@ -88,6 +88,7 @@
 ###
 include $(CLEAR_VARS)
 LOCAL_MODULE := android.hardware.wifi@1.0-service-tests
+LOCAL_PROPRIETARY_MODULE := true
 LOCAL_SRC_FILES := \
     tests/main.cpp \
     tests/mock_wifi_feature_flags.cpp \