Moving default values into separate files.

Make DefaultCarrierConfigService easier to maintain by moving the values
for each network into XML files. It's important to note that this uses
assets and not resources. The file for a particular network may depend
on more than just the MCC+MNC in the future.

Note on the XML document format. This is set by
PersistableBundle.restoreFromXml, so there is no option to change it in
this CL.

Bug: 21618018
Change-Id: Iecfe7009c2aa0f7a9d5814d1f355dfe4190ce912
diff --git a/res/xml/vendor.xml b/res/xml/vendor.xml
new file mode 100644
index 0000000..58a87d8
--- /dev/null
+++ b/res/xml/vendor.xml
@@ -0,0 +1,6 @@
+<?xml version='1.0' encoding='utf-8' standalone='yes' ?>
+<!-- This is a place for vendor-specific config values. The format and
+     filtering rules are the same as those in carrier_config*.xml files. This
+     file is read after any specific config file from the assets folder, so it
+     must use explicit filters for MCC ad MNC if that is desired. -->
+<carrier_config_list />