Merge pull request #357 from JemyCheung/https

default use https [ci skip]

Author: bachue

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

@@ -116,7 +116,7 @@ public static class Builder {
         private KeyGenerator keyGen = null;
         private ProxyConfiguration proxy = null;
 
-        private boolean useHttps = false;
+        private boolean useHttps = true;
         private int chunkSize = 2 * 1024 * 1024;
         private int putThreshold = 4 * 1024 * 1024;
         private int connectTimeout = 10;