Migrate frameworks/base/tests/net/ to androidx.test

Test: atest FrameworksNetTests
Change-Id: Iaa59d606f5e1678cc5aaca9ed37e184fad894e5d
diff --git a/tests/net/java/android/net/LinkPropertiesTest.java b/tests/net/java/android/net/LinkPropertiesTest.java
index bdde096..9a7d487 100644
--- a/tests/net/java/android/net/LinkPropertiesTest.java
+++ b/tests/net/java/android/net/LinkPropertiesTest.java
@@ -24,11 +24,12 @@
 
 import android.net.LinkProperties.CompareResult;
 import android.net.LinkProperties.ProvisioningChange;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.system.OsConstants;
 import android.util.ArraySet;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.internal.util.TestUtils;
 
 import org.junit.Test;