更改 dns 接口，更通用 [ci skip]

Author: sxci

library/src/main/java/com/qiniu/android/storage/Configuration.java

@@ -1,6 +1,5 @@
 package com.qiniu.android.storage;
 
-
 import com.qiniu.android.common.AutoZone;
 import com.qiniu.android.common.Zone;
 import com.qiniu.android.dns.DnsManager;