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

tests/cts/net/Android.bp

@@ -82,6 +82,7 @@ android_test {
     min_sdk_version: "29",
     target_sdk_version: "29",
     test_suites: [
+        "device-tests",
         "mts",
     ],
     test_config_template: "AndroidTestTemplate.xml",

tests/cts/net/TEST_MAPPING

@@ -0,0 +1,13 @@
+{
+  // TODO: move to mainline-presubmit once supported
+  "postsubmit": [
+    {
+      "name": "CtsNetTestCasesLatestSdk",
+      "options": [
+        {
+          "exclude-annotation": "com.android.testutils.SkipPresubmit"
+        }
+      ]
+    }
+  ]
+}

tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java

@@ -96,6 +96,7 @@ import androidx.test.InstrumentationRegistry;
 import androidx.test.runner.AndroidJUnit4;
 
 import com.android.internal.util.ArrayUtils;
+import com.android.testutils.SkipPresubmit;
 
 import libcore.io.Streams;
 
@@ -325,6 +326,7 @@ public class ConnectivityManagerTest {
      */
     @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
     @Test
+    @SkipPresubmit(reason = "Virtual devices use a single internet connection for all networks")
     public void testOpenConnection() throws Exception {
         boolean canRunTest = mPackageManager.hasSystemFeature(FEATURE_WIFI)
                 && mPackageManager.hasSystemFeature(FEATURE_TELEPHONY);
@@ -990,6 +992,7 @@ public class ConnectivityManagerTest {
 
     @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
     @Test
+    @SkipPresubmit(reason = "Keepalive is not supported on virtual hardware")
     public void testCreateTcpKeepalive() throws Exception {
         if (!mPackageManager.hasSystemFeature(FEATURE_WIFI)) {
             Log.i(TAG, "testCreateTcpKeepalive cannot execute unless device supports WiFi");
@@ -1199,6 +1202,7 @@ public class ConnectivityManagerTest {
      */
     @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
     @Test
+    @SkipPresubmit(reason = "Keepalive is not supported on virtual hardware")
     public void testSocketKeepaliveLimitWifi() throws Exception {
         if (!mPackageManager.hasSystemFeature(FEATURE_WIFI)) {
             Log.i(TAG, "testSocketKeepaliveLimitWifi cannot execute unless device"
@@ -1252,6 +1256,7 @@ public class ConnectivityManagerTest {
      */
     @AppModeFull(reason = "Cannot request network in instant app mode")
     @Test
+    @SkipPresubmit(reason = "Keepalive is not supported on virtual hardware")
     public void testSocketKeepaliveLimitTelephony() throws Exception {
         if (!mPackageManager.hasSystemFeature(FEATURE_TELEPHONY)) {
             Log.i(TAG, "testSocketKeepaliveLimitTelephony cannot execute unless device"
@@ -1294,6 +1299,7 @@ public class ConnectivityManagerTest {
      */
     @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
     @Test
+    @SkipPresubmit(reason = "Keepalive is not supported on virtual hardware")
     public void testSocketKeepaliveUnprivileged() throws Exception {
         if (!mPackageManager.hasSystemFeature(FEATURE_WIFI)) {
             Log.i(TAG, "testSocketKeepaliveUnprivileged cannot execute unless device"

tests/cts/net/src/android/net/cts/DnsTest.java

@@ -27,6 +27,8 @@ import android.os.SystemClock;
 import android.test.AndroidTestCase;
 import android.util.Log;
 
+import com.android.testutils.SkipPresubmit;
+
 import java.net.Inet4Address;
 import java.net.Inet6Address;
 import java.net.InetAddress;
@@ -68,6 +70,7 @@ public class DnsTest extends AndroidTestCase {
      * Perf - measure size of first and second tier caches and their effect
      * Assert requires network permission
      */
+    @SkipPresubmit(reason = "IPv6 support may be missing on presubmit virtual hardware")
     public void testDnsWorks() throws Exception {
         ensureIpv6Connectivity();