Port "Strip Unicode" feature from ICS branch into JB-MR1

This feature add support for strip unicode characters that are not
supported for 160 character SMS.

Change-Id: I10c8f35b86f009b5484754572ff6ea33c52a4df3
Signed-off-by: Petr Reznicek <kecinzer@gmail.com>

Conflicts:

	res/values-cs/strings.xml

Signed-off-by: rohan <rohanmathur34@gmail.com>