am 7713b900: Merge "Fixing namespace+prefix mode in Expat and removing optional fields from callbacks."

Merge commit '7713b900d12c7a46334db46b33fbe848167189dd' into dalvik-dev

* commit '7713b900d12c7a46334db46b33fbe848167189dd':
  Fixing namespace+prefix mode in Expat and removing optional fields from callbacks.