fix interfaceflags for softap

Change-Id: I4a4fa1e5f033c945feb64b2544b8c78618bb1f3e
Signed-off-by: jmzhu <jmzhu@marvell.com>
diff --git a/services/java/com/android/server/WifiService.java b/services/java/com/android/server/WifiService.java
index 210fe8a..2008215 100644
--- a/services/java/com/android/server/WifiService.java
+++ b/services/java/com/android/server/WifiService.java
@@ -368,7 +368,7 @@
                             /* IP/netmask: 192.168.43.1/255.255.255.0 */
                             ifcg.ipAddr = (192 << 24) + (168 << 16) + (43 << 8) + 1;
                             ifcg.netmask = (255 << 24) + (255 << 16) + (255 << 8) + 0;
-                            ifcg.interfaceFlags = "up";
+                            ifcg.interfaceFlags = "[up]";
 
                             service.setInterfaceConfig(intf, ifcg);
                         }