Bug997547 correspondence of reviews

I just openned bug 1027066 to have a common way for contacts and settings to know when sending to mms will be enabled.

We can land this and fetch that value in the follow up. Please just add a comment above the line indicating that we will deal with that value in a follow up, something like:
// XXX bug 1027066: We will get the real value in the follow up done in this bug