esim.saip.File: Proper ARR conversion of template (into) to file (bytes)

The encoding of the access rule reference is different in FileTemplate
vs File, let's make sure we properly convert it when instantiating a
File from a FileTemplate.

Change-Id: Ibb8afb85cc0006bc5c59230ebf28b2c0c1a8a8ed

pySim/esim/saip/__init__.py

@@ -178,7 +178,7 @@ class File:
         self.file_type = template.file_type
         self.fid = template.fid
         self.sfi = template.sfi
-        self.arr = template.arr
+        self.arr = template.arr.to_bytes(1)
         if hasattr(template, 'rec_len'):
             self.rec_len = template.rec_len
         else: