Allow connectivity tests to use hidden APIs

The tests have been building against hidden APIs to provide additional
coverage.

Test: m TetheringCoverageTests CtsNetTestCases
Bug: 182859030
Ignore-AOSP-First: needs manual cherry-picks
Change-Id: I37d748411a34f25834214a2412c49aed1423e526
diff --git a/Tethering/tests/unit/Android.bp b/Tethering/tests/unit/Android.bp
index 41135f2..011b878 100644
--- a/Tethering/tests/unit/Android.bp
+++ b/Tethering/tests/unit/Android.bp
@@ -33,7 +33,7 @@
     sdk_version: "core_platform",
     libs: [
         "framework-minus-apex",
-        "framework-connectivity.stubs.module_lib",
+        "framework-connectivity.impl",
         "framework-tethering.impl",
     ],
     visibility: [