Mms: Add the ability to select recipients from a checkbox list

When creating a new message you have to write some letters from the
contacts you want to add and select them by clicking on it.

This can be annoying if you want to send your message to several contacts.
With this change you can manually select numbers from contacts and groups
from a checkbox list.

Conflicts:
	res/values/strings.xml

Change-Id: Iaf9f5545c8a61ade338f7668bef0306d3349d84d
Merge "Mms: Add the ability to select recipients from a checkbox list" into jb43