Revert "Skip connectivity unit tests before S"

This reverts commit 05dd1ba540.

Reason for revert: Skips more tests than it should in AOSP
Bug: 192302892

Change-Id: I7c5638d8c1cc626354d240a06af758e1cdd92e94

tests/unit/java/android/net/Ikev2VpnProfileTest.java

@@ -23,10 +23,8 @@ import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
-import android.os.Build;
 import android.test.mock.MockContext;
 
-import androidx.test.filters.SdkSuppress;
 import androidx.test.filters.SmallTest;
 import androidx.test.runner.AndroidJUnit4;
 
@@ -54,7 +52,6 @@ import javax.security.auth.x500.X500Principal;
 /** Unit tests for {@link Ikev2VpnProfile.Builder}. */
 @SmallTest
 @RunWith(AndroidJUnit4.class)
-@SdkSuppress(minSdkVersion = Build.VERSION_CODES.S, codeName = "S")
 public class Ikev2VpnProfileTest {
     private static final String SERVER_ADDR_STRING = "1.2.3.4";
     private static final String IDENTITY_STRING = "Identity";