[NETD-TC#7] Move getIfaceNames() and getIfaceList() to libnetdutils.

getIfaceNames() and getIfaceList() are used by Netd.

Test: m; flash; boot
Change-Id: Id95e2e7e83c07b2f420880feebdf12d4c477c958
diff --git a/staticlibs/netd/libnetdutils/Android.bp b/staticlibs/netd/libnetdutils/Android.bp
index 9f4d6e3..732e37d 100644
--- a/staticlibs/netd/libnetdutils/Android.bp
+++ b/staticlibs/netd/libnetdutils/Android.bp
@@ -18,6 +18,7 @@
         "Syscalls.cpp",
         "UniqueFd.cpp",
         "UniqueFile.cpp",
+        "Utils.cpp",
     ],
     defaults: ["netd_defaults"],
     cflags: ["-Wall", "-Werror"],