Add the fixed test case back into presubmit

testRegisterCallbackWithCarrierPrivileges was marked as
SkipPresubmit. The bug is expected to be fixed, so add the
test back into presubmit.

Test: atest android.net.cts.ConnectivityDiagnosticsManagerTest
Bug: 159718782
Change-Id: Ic7dc050de0d9f03f0e157927928b4c45f76fe2d7
diff --git a/tests/cts/net/src/android/net/cts/ConnectivityDiagnosticsManagerTest.java b/tests/cts/net/src/android/net/cts/ConnectivityDiagnosticsManagerTest.java
index c9fed44..232114e 100644
--- a/tests/cts/net/src/android/net/cts/ConnectivityDiagnosticsManagerTest.java
+++ b/tests/cts/net/src/android/net/cts/ConnectivityDiagnosticsManagerTest.java
@@ -85,7 +85,6 @@
 import com.android.net.module.util.ArrayTrackRecord;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
 import com.android.testutils.DevSdkIgnoreRunner;
-import com.android.testutils.SkipPresubmit;
 
 import org.junit.After;
 import org.junit.Before;
@@ -207,7 +206,6 @@
         cb.assertNoCallback();
     }
 
-    @SkipPresubmit(reason = "Flaky: b/159718782; add to presubmit after fixing")
     @Test
     public void testRegisterCallbackWithCarrierPrivileges() throws Exception {
         assumeTrue(mPackageManager.hasSystemFeature(FEATURE_TELEPHONY));