Clean up un-used ContactListEmptyView.

The code path to ContactListEmptyView is not used.  Prefactor to moving
ContactEntryListFragment.

Also removed isSyncActive() from ContactEntryListFragment since that will
help with un-bundling in the future.

Bug: 6993891
Change-Id: I5fa5270067530f672e18886c070d1abbb60a2542