Fix QUrl handling after QUrl changes.

Fix QUrl handling after QUrl changes.

toString() is fine for most usages but here the result is made part of XML
bits, so toEncoded() is necessary so that '<' and '>' are percent-encoded.

Change-Id: I41832cefe3ae12cab13531f17095d0804a2e86d9
Sanity-Review: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>