Revert "Fix a bootloop problem when /data/system/usagestats/usage-history.xml is empty."

This reverts commit 5a702aaffcd9f1233f816e5dd169bb21da2e321f.
Fix broken XML parsing idiom.

Code that expected a single top level element in an XML file
was doing something like :

while (type != START_TAG) { next(); }

This would loop forever when the XML being parsed was empty,
where each call to XmlPullParser.next() would return END_DOCUMENT.

bug: https://code.google.com/p/android/issues/detail?id=64173
Change-Id: I7543203e976a8999ae471a6c2d629249a87011bb
Revert "Do not show roaming icon for Videotron operator when access Canada network"

This reverts commit 119e24f98706cb0a1217b41e7e750b94c1a8941a.

Bug: 12163013
Change-Id: I574d1492253eb6e1f570411e441c5bea7376112c