Delete the last remaining user of TestNetworkStackLib.

FrameworksNetIntegrationTests is the last user of this target.
It is not really necessary since it can trivially be replaced by
NetworkStackApiStableLib.

Bug: 167645754
Test: atest FrameworksNetIntegrationTests
Change-Id: Id5e8eb3f58590f4b3cfbcbef66b00acbba77a7a7
diff --git a/tests/net/integration/Android.bp b/tests/net/integration/Android.bp
index 4d1e337..56f9df7 100644
--- a/tests/net/integration/Android.bp
+++ b/tests/net/integration/Android.bp
@@ -35,7 +35,7 @@
         "android.test.mock",
     ],
     static_libs: [
-        "TestNetworkStackLib",
+        "NetworkStackApiStableLib",
         "androidx.test.ext.junit",
         "frameworks-net-integration-testutils",
         "kotlin-reflect",