Mms: Move CAF strings

Change-Id: I0e92dbd6b68eae21648fb700c130cdf49b045b06
Mms: Remove unused strings

Change-Id: I0f361a572e2ed1adde38d74ce9766ecee30160bd
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_packages_apps_Mms into android-4.4