Change the logic of the LOOKS_LIKE_TYPO flag

It now follows the following logic:
- If the word should be filtered out => false
- Else => !IN_THE_DICTIONARY

This defines the behavior for ICS MR0, and prepares for addition
of a new HAS_LIKELY_SUGGESTIONS flag in MR1.

Bug: 5383800

Change-Id: I530b1404ae8cf3337ff68ef5ab0f4d95f2dad0e8