vold: Add support for unencrypted persistent info

In order to display the correct language, timezone, airplane
mode and other settings on the decrypt screen, a copy of those
settings needs to be stored unencrypted so the framework can
query them.  This adds support to vold to store up to 32
property like key/value pairs that are not encrypted.

Change-Id: Id5c936d2c57d46ed5cff9325d92ba1e8d2ec8972
diff --git a/ResponseCode.h b/ResponseCode.h
index 402e35b..dccacb8 100644
--- a/ResponseCode.h
+++ b/ResponseCode.h
@@ -26,6 +26,7 @@
     static const int VolumeListResult         = 110;
     static const int AsecListResult           = 111;
     static const int StorageUsersListResult   = 112;
+    static const int CryptfsGetfieldResult    = 113;
 
     // 200 series - Requested action has been successfully completed
     static const int CommandOkay              = 200;