This does nothing. getRouterContext() is always null when onActivityResult() is
called. Todo: implement callback that fires when the Router has bound and the
Fragment has an Activity.

Addressbook Loader works (from previous commit). Todo: put name count
in list header.

Broken, addresses do not load into mAdapter after a tab change.

getRouterContext() returns null in onActivityCreated(), there is a race
condition to fix somewhere, use refresh action to load.