Allow hidden connectivity APIs in net test utils

The net test utils are used for unit tests exercising connectivity code,
and need access to its hidden APIs.

Bug: 182859030
Test: atest NetworkStaticLibTests
Ignore-AOSP-First: needs manual cherry-picks
Change-Id: I33273e5c1cc2731443f0fd745ce526473a704520
diff --git a/staticlibs/testutils/Android.bp b/staticlibs/testutils/Android.bp
index d4465dd..1a7b437 100644
--- a/staticlibs/testutils/Android.bp
+++ b/staticlibs/testutils/Android.bp
@@ -22,7 +22,10 @@
         "devicetests/**/*.java",
         "devicetests/**/*.kt",
     ],
-    defaults: ["lib_mockito_extended"],
+    defaults: [
+        "framework-connectivity-test-defaults",
+        "lib_mockito_extended"
+    ],
     libs: [
         "androidx.annotation_annotation",
     ],