Mms: Allow to delay sending SMS

Add feature to delay SMS sending, user being able to cancel SMS sending by touching the SMS, until delay is elapsed.

Author  YuanQY<yuanqingyun@gmail.com>
Date    Apr 21, 2013 4:35 AM
http://review.cyanogenmod.org/#/c/36178

Patch Set 6:
        Changed delay values
        Updated / Removed comments line
        Updated countdown / notice string