mSign now have default visibility to use in parceler without using reflection

Author: edwardstock

src/main/java/network/minter/blockchain/models/operational/TransactionSign.java

@@ -35,7 +35,7 @@
  */
 @Parcel
 public final class TransactionSign {
-    private String mSign;
+    String mSign;
 
     public TransactionSign(String sign) {
         mSign = sign;