Modify test now that LocalSocket.getSoTimeout() does something

Bug: 3106438
Change-Id: Iac7153607d5da44f21d66da80e2db27b17002d8d

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

@@ -129,9 +129,9 @@ public class LocalSocketTest extends AndroidTestCase{
         socket.setSendBufferSize(3998);
         assertEquals(3998 << 1, socket.getSendBufferSize());
 
-        // Timeout is not support at present, so set is ignored
-        socket.setSoTimeout(1996);
         assertEquals(0, socket.getSoTimeout());
+        socket.setSoTimeout(1996);
+        assertTrue(socket.getSoTimeout() > 0);
 
         try {
             socket.getRemoteSocketAddress();