Dedup NANPA numbers

Reverts changes from Bug 5779336 that stopped using libphonenumber for
detecting dups, although keep matching as strict except when one number
begins with +1, in which case collapse. Change Collapser to allow
preferred collapse direction.

Bug:7519057
Change-Id: Ib8ba6da611638d05781ed4363d71bc2628d907b7
2 files changed
tree: 35f300c65a59045de0fb3df7b8366175375925f5
  1. src/
  2. TestCommon/
  3. tests/