set readConfigFlags read default value to 28

fix if size == 28, remainingSize error.

brut.apktool/apktool-lib/src/main/java/brut/androlib/res/decoder/ARSCDecoder.java

@@ -264,7 +264,7 @@ public class ARSCDecoder {
     private ResConfigFlags readConfigFlags() throws IOException,
             AndrolibException {
         int size = mIn.readInt();
-        int read = 0;
+        int read = 28;
 
         if (size < 28) {
             throw new AndrolibException("Config size < 28");