Improve Phone UI's horizontal swipe behavior

- fix an obvious bug in PhoneFavoriteFragment, with which sort-order and
  display-order preserved by the "all" adapter are just ignored. Because
  of that the whole "all-contacts" section has been loaded every time
  when its View is recreated.
- stop creating two Adapters on PhoneFavoriteFragment#onCreateView(),
  which will cause unnecessary reload of those adapters.
- use ViewPager#setOffsreenPageLimit(2) to keep all the three fragments
  during user's interaction.

Bug: 6005454
Change-Id: I8769eeba7e5568afedea097b2d388c6ed93fcf40