android_xmlrpc_server: Use |bytearray| instead of |bytes|

Needed for python 2.0 compatibility.

BUG=29766959
Change-Id: Id8002c1de24e17a243f4fa1b4dab965aefd65716
Reviewed-on: https://chromium-review.googlesource.com/357430
Reviewed-by: Bindu Mahadev <bmahadev@chromium.org>
Commit-Queue: Roshan Pius <rpius@chromium.org>
Tested-by: Roshan Pius <rpius@chromium.org>
diff --git a/client/cros/networking/android_xmlrpc_server.py b/client/cros/networking/android_xmlrpc_server.py
index 6f248f8..7a18c91 100755
--- a/client/cros/networking/android_xmlrpc_server.py
+++ b/client/cros/networking/android_xmlrpc_server.py
@@ -413,7 +413,7 @@
                         wep_hex_keys.append(key)
                     else:
                         hex_key = ""
-                        for byte in bytes(key, 'utf-8'):
+                        for byte in bytearray(key, 'utf-8'):
                             hex_key += '%x' % byte
                         wep_hex_keys.append(hex_key)
                 network_config["wepKeys"] = wep_hex_keys