We need revised scoring test because dictionary look up algorithm has
been changed significantly since this SuggestTests was made.

Change-Id: I69d527a6bfa24ed0dc189fddad1afab0566c6eb8

TODO: Cleanup will follow.

Change-Id: I4a68ba9f2f55760aa24187f1f13fdfa8a0b70963

  - after first character, only suggests bigram data (but doesn't autocomplete)
  - after second character, words from dictionary gets rearranged by using bigram
  - compatible with old dictionary
  - added preference option to disable bigram

Change-Id: Ia8f4e8fa55e797e86d858fd499887cd396388411

Added tests for the dictionary lookup and correction logic on the primary dictionary.
This exercises part of the Suggest class and the native dictionary lookup code.