Use function inside NetdUtils instead of NetworkManagementService

TestNetworkService will be a part of mainline module, to prevent
using @hide API of NetworkManagementService in TestNetworkService,
use function inside NetdUtils instead.

Bug: 170598012
Test: atest CtsNetTestCasesLatestSdk
Change-Id: I738066ce2f1bcd616dc582a3ff1fd77bcd660c73
diff --git a/service/Android.bp b/service/Android.bp
index c8f3bd3..8fc3181 100644
--- a/service/Android.bp
+++ b/service/Android.bp
@@ -57,6 +57,7 @@
     static_libs: [
         "net-utils-device-common",
         "net-utils-framework-common",
+        "netd-client",
     ],
     apex_available: [
         "//apex_available:platform",