Dialer: Fixes for Transifex

* Update copyright year
* Move dialpad T9 strings to new file so they aren't picked by Transifex
  Translators should never translate these strings unless they make all
  the needed source changes to add T9 support for their language

Change-Id: I7653f91eb8ebb3d01368c66e1a3c2d81a39ac35e