wifi(implementation): Generate randomized mac address

Generate random MAC address on the first creation of AP iface after
reboot.

Bug: 78353419
Test: ./hardware/interfaces/wifi/1.3/default/tests/runtests.sh
Test: Manually verified that the AP MAC address & BSSID changes on every
reboot.
Change-Id: Ie9984ec72b2dfec9b7de7a9ef33b9e9ebfaf945c
diff --git a/wifi/1.3/default/Android.mk b/wifi/1.3/default/Android.mk
index 7ebea4f..199ea3b 100644
--- a/wifi/1.3/default/Android.mk
+++ b/wifi/1.3/default/Android.mk
@@ -148,7 +148,8 @@
     tests/mock_wifi_mode_controller.cpp \
     tests/ringbuffer_unit_tests.cpp \
     tests/wifi_ap_iface_unit_tests.cpp \
-    tests/wifi_chip_unit_tests.cpp
+    tests/wifi_chip_unit_tests.cpp \
+    tests/wifi_iface_util_unit_tests.cpp
 LOCAL_STATIC_LIBRARIES := \
     libgmock \
     libgtest \