Fix testGetAllNetworkStateSnapshots for non-cellular

bug: 192115694
Test: atest ConnectivityManagerTest#testGetAllNetworkStateSnapshots
Change-Id: Ie7f637248302f3e6b61be69ef4c6a7a906e69275

tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java

@@ -464,6 +464,7 @@ public class ConnectivityManagerTest {
     @Test
     public void testGetAllNetworkStateSnapshots()
             throws InterruptedException {
+        assumeTrue(mPackageManager.hasSystemFeature(FEATURE_TELEPHONY));
         // Make sure cell is active to retrieve IMSI for verification in later step.
         final Network cellNetwork = mCtsNetUtils.connectToCell();
         final String subscriberId = getSubscriberIdForCellNetwork(cellNetwork);