Implement SMS mark for unread (Cyan-348)

Change-Id: I999e4159603d13062b535b2445cbc7efd3cf9b7b

Conflicts:

	res/values/cm_strings.xml
Mms: remove unnecesary reference to xxhdpi/ic_menu_call.png

ic_menu_call.png is not used anymore and is caused crashed on low resolution devices

Change-Id: Iaafeed7c467cd128908b20361752d20b218c0f40
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
Mms: use Holo Light theme

PS6:  Changed actionbar buttons order so delete
      is the right-most one.
PS8:  Added "mark as read" drawables (thanks Björn)
PS10: Fixed ActionBar text color.

Screenshots:
  https://dl.dropboxusercontent.com/u/16268774/cm_temp/newmms1.jpg
  https://dl.dropboxusercontent.com/u/16268774/cm_temp/newmms2.jpg
  https://dl.dropboxusercontent.com/u/16268774/cm_temp/newmms3.jpg

Change-Id: I8eefe77687d03b143a85261413a05e3ed76ba090