Mms: Update IW translations

removed translations that aren't used.

Change-Id: I2d2ba620f52dc25a55b9af2d694ab6e72fc85517
Mms: PT-BR translations

Change-Id: Ie3b6334f79ee8078c7c9fb7fcd11eb78a628e5fe
Mms: FR translation

Change-Id: Ibde777d473047b5bc63464e046028ee53e6ae2cb
Implement SMS mark for unread (Cyan-348)

Change-Id: I999e4159603d13062b535b2445cbc7efd3cf9b7b
Mms: Move Mark as unread strings to the correct places

* Strings go to cm_strings
* Plurals go to cm_plurals
* Fixed plurals for CM standards

Change-Id: I7227c27039188202b376ecf50d79c9918c3b456a