Annotate TetherInterfaceStateMachineTest for APCT

APCT needs a little additional magic to pick up JUnit4 tests.

Bug: 28958508
Test: Tests continue to pass

Change-Id: Ia45d91bb3b06e60e3a46ffe738d4468356e066b3
(cherry picked from commit d905add4747d6060355c44dac1dce0eccd8014fb)
diff --git a/services/tests/servicestests/src/com/android/server/connectivity/tethering/TetherInterfaceStateMachineTest.java b/services/tests/servicestests/src/com/android/server/connectivity/tethering/TetherInterfaceStateMachineTest.java
index fb5a1cf..2c54f3b 100644
--- a/services/tests/servicestests/src/com/android/server/connectivity/tethering/TetherInterfaceStateMachineTest.java
+++ b/services/tests/servicestests/src/com/android/server/connectivity/tethering/TetherInterfaceStateMachineTest.java
@@ -29,14 +29,18 @@
 import android.os.INetworkManagementService;
 import android.os.RemoteException;
 import android.os.test.TestLooper;
+import android.support.test.filters.SmallTest;
+import android.support.test.runner.AndroidJUnit4;
 
 import org.junit.Before;
 import org.junit.Test;
+import org.junit.runner.RunWith;
 import org.mockito.InOrder;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
-
+@RunWith(AndroidJUnit4.class)
+@SmallTest
 public class TetherInterfaceStateMachineTest {
     private static final String IFACE_NAME = "testnet1";
     private static final String UPSTREAM_IFACE = "upstream0";
@@ -241,4 +245,4 @@
                 upstreamIface);
         mLooper.dispatchAll();
     }
-}
+}
\ No newline at end of file