Remove AppCompat library from Contacts (2/3)

* CL was prepared by running the following:

  git revert --no-commit 52c1a302f933cf14b93e7a5e14426eec44d67953 # https://googleplex-android-review.git.corp.google.com/#/c/842208/
  git revert --no-commit 6497a0d3a9cf5f0dafb04a4b5192996c8840afc3 # https://googleplex-android-review.git.corp.google.com/#/c/841415/
  git revert --no-commit 3630a43f51abaf302e02def9ed16f95c8b121423 # https://googleplex-android-review.git.corp.google.com/#/c/839681/

Also:
  didn't revert the changes in java source file of ag/842208 because
it fixed a bug on tablet (see the decription in https://googleplex-android-review.git.corp.google.com/#/c/842208/)

Bug 27257097

Change-Id: I43a78c915fa18db72d4ff7f03832b0cbf1acd5c0