Disable CtsNetTestCases in mainline-prod.

This currently still builds, but it will stop building as soon
as we make it depend on the networkstack current shims. It should
not be used for anything in mainline-prod anyway, everything uses
CtsNetTestCasesLatestSdk.

The Merged-In clause is from unrelated change aosp/1542627 and is
intended to ensure this change does not propagate to any
downstream branches.

Bug: 167645754
Test: mmm packages/modules/Connectivity
Change-Id: Ib47b181902e8e634f419e5544472859760c2ce77
Merged-In: Ib0ac49609e444a53a6fee4575f5078e15f364eef
diff --git a/tests/cts/net/Android.bp b/tests/cts/net/Android.bp
index 4c5950d..24710f1 100644
--- a/tests/cts/net/Android.bp
+++ b/tests/cts/net/Android.bp
@@ -71,6 +71,7 @@
 // devices.
 android_test {
     name: "CtsNetTestCases",
+    enabled: false, // Disabled in mainline-prod
     defaults: ["CtsNetTestCasesDefaults"],
     test_suites: [
         "cts",