Annotate NetworkRequestTest as ConnectivityModuleTest.

This class is in the Tethering module, so any time we update it,
the tests are likely to fail unless Tethering is installed.

Fix: 324367069
Test: TH (test-only change)
Change-Id: I3d906e261939ff70225deeddff91cc6a83efe264
diff --git a/tests/cts/net/src/android/net/cts/NetworkRequestTest.java b/tests/cts/net/src/android/net/cts/NetworkRequestTest.java
index 5a4587c..6ec4e62 100644
--- a/tests/cts/net/src/android/net/cts/NetworkRequestTest.java
+++ b/tests/cts/net/src/android/net/cts/NetworkRequestTest.java
@@ -64,6 +64,7 @@
 import com.android.networkstack.apishim.NetworkRequestShimImpl;
 import com.android.networkstack.apishim.common.NetworkRequestShim;
 import com.android.networkstack.apishim.common.UnsupportedApiLevelException;
+import com.android.testutils.ConnectivityModuleTest;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
 
@@ -74,6 +75,7 @@
 import java.util.Set;
 
 @RunWith(AndroidJUnit4.class)
+@ConnectivityModuleTest
 public class NetworkRequestTest {
     @Rule
     public final DevSdkIgnoreRule ignoreRule = new DevSdkIgnoreRule();