Mark EthernetManagerTest as @ConnectivityModuleTest

The test will fail on T without an updated connectivity module, as it
uses new behavior implemented by a newer module version, such as
TestNetworkManager#createTapInterface(boolean, boolean).

Bug: 236558929
Change-Id: Ia74a31c8f7aabb4aae8eead5bba9f31cb7f2dd8d
Test: atest EthernetManagerTest
diff --git a/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt b/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
index d0d44dc..54d6818 100644
--- a/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
+++ b/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
@@ -56,6 +56,7 @@
 import com.android.net.module.util.ArrayTrackRecord
 import com.android.net.module.util.TrackRecord
 import com.android.testutils.anyNetwork
+import com.android.testutils.ConnectivityModuleTest
 import com.android.testutils.DevSdkIgnoreRule
 import com.android.testutils.DevSdkIgnoreRunner
 import com.android.testutils.RecorderCallback.CallbackEntry.Available
@@ -97,6 +98,8 @@
 @AppModeFull(reason = "Instant apps can't access EthernetManager")
 // EthernetManager is not updatable before T, so tests do not need to be backwards compatible.
 @RunWith(DevSdkIgnoreRunner::class)
+// This test depends on behavior introduced post-T as part of connectivity module updates
+@ConnectivityModuleTest
 @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.S_V2)
 class EthernetManagerTest {