(cont) Now using loaders and LoaderManagingFragment

The change is partial and for now Favorites and
lots of other things are broken.

Change-Id: I1eb4f692e2d427473b179a3b3b00ef5233507f67
Merge commit 'e44b043f8a49c0974bd2f705f98ac3277aaf1b67' into HEAD

* commit 'e44b043f8a49c0974bd2f705f98ac3277aaf1b67':
  (cont) Now using loaders and LoaderManagingFragment
Modify ImportVCardService so that it does not rely on a stale constructor.

We are not 100% sure whether this change is really correct though all tests are in green.

Related change: I16e487fa

Change-Id: I0a5aa1ea587c6b2d25ce90ba0a23bc14ea8a12f5
Revert "DO NOT MERGE Fix Activity instance leak by ContactsPreferences observer"

This reverts commit c7f25410daccf9e14c1726fd3e778910d894f243.

Conflicts:
	src/com/android/contacts/ContactsListActivity.java
Making call log work again

Change-Id: I2de6d8bd0f7bf5a68e15a692671cdcb6c68ab016