Resolve DNS64 hostname with Private DNS bypass

Test: as follows
    - builds
    - flashes
    - boots
    - runtest -x external/android-clat/clatd_test.cpp passes
Bug: 64133961
Bug: 72345192

Change-Id: If5238d0cdf27cb4cd689e1ff1ff776bc638d5a7b
diff --git a/Android.mk b/Android.mk
index 8c0a43e..cae37fc 100644
--- a/Android.mk
+++ b/Android.mk
@@ -6,7 +6,7 @@
 LOCAL_CFLAGS := -Wall -Werror -Wunused-parameter
 # Bug: http://b/33566695
 LOCAL_CFLAGS += -Wno-address-of-packed-member
-LOCAL_C_INCLUDES := external/libnl/include bionic/libc/dns/include
+LOCAL_C_INCLUDES := external/libnl/include bionic/libc/dns/include system/netd/include
 LOCAL_STATIC_LIBRARIES := libnl
 LOCAL_SHARED_LIBRARIES := libcutils liblog libnetutils