Updated French localization with regular French strings.xml and added Canadian...

Updated French localization with regular French strings.xml and added Canadian French localization file.

Update issue 1916
Status: started

I updated the existing strings.xml with many of your fixes and added a Canadian French specific strings.xml: it only contains terms that differ.

Identified terms (fr / fr_CA) :
e-mail / courriel
spam / pourriel

You can now choose "Français (Canada)" language from the configuration screen.

I tried to match the Gmail application running on a system configured with French locale: it mainly use the "message" term and sometime "e-mail" like in notifications as well as "spam".
Some other modifications are spelling fixes.