make utf-8 default encoding for remoting_localize.py

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=245489

Review URL: https://codereview.chromium.org/140793007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245670 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245670