Breaking out the Multi-Picker into a separate activity.

Continuing the "nuke" part of the nuke-and-rebuild
process for ContactsListActivity. At this stage the code
will look worse than before, but hopefully will remain
fully functional.

Bear with us - we are in the middle of a major refactoring.

Change-Id: Idad9fa2e589dce0bcd3f62b9c7d5bf22fea6c5e1
10 files changed