MMS configuration

Adding MMS settings to Webbing configuration.

Test: Settings loaded manually on a Pixel unit.x

Signed-off-by: Tiago <tiago@iamwebbing.com>
(cherry picked from https://android-review.googlesource.com/q/commit:4951ee3c20c6cde3f4cb64dad4eb94e4595b3d9b)
Merged-In: If97bde26d85b42369d7f34059e67910c35588dfc
Change-Id: If97bde26d85b42369d7f34059e67910c35588dfc