Add CtsNetTestCasesLatestSdk to postsubmit

Also exclude some tests that cannot run on cuttlefish.
This is a first step to add the suite to presubmit. Having the test in
presubmit is essential to avoid regressions and keep it passing.

Bug: 158153057
Test: m CtsNetTestCases; this patch will provide postsubmit results
Change-Id: I48b2b5490d3fd5eb6f9456825c11f3fee0ec5b67
diff --git a/tests/cts/net/Android.bp b/tests/cts/net/Android.bp
index 82b7413..052ab26 100644
--- a/tests/cts/net/Android.bp
+++ b/tests/cts/net/Android.bp
@@ -82,6 +82,7 @@
     min_sdk_version: "29",
     target_sdk_version: "29",
     test_suites: [
+        "device-tests",
         "mts",
     ],
     test_config_template: "AndroidTestTemplate.xml",