MMS - Additional features

PS7:  Removed duplicate strings entries...oops
PS8:  Removed custom user agent option

ForwardPort Direct Call Feature
https://github.com/LiquidSmooth/android_packages_apps_Mms/commit/dff4bb4c6d2a6212212666f0a0a2a90c1fb61455

Add font size to Message threads
https://github.com/LiquidSmooth/android_packages_apps_Mms/commit/bbe9cf2736c774ab7ce723cedb08220e541957f3

Change-Id: I17dc4ead6cc761846f62e4a8f89d42ac51e8906d