Integrate the logic to calculate the proximities

.../android/inputmethod/keyboard/KeyboardActionListener.java

...c/com/android/inputmethod/keyboard/LatinKeyboardView.java

...om/android/inputmethod/keyboard/MoreKeysKeyboardView.java

.../src/com/android/inputmethod/keyboard/PointerTracker.java

java/src/com/android/inputmethod/latin/LatinIME.java

java/src/com/android/inputmethod/latin/Suggest.java

java/src/com/android/inputmethod/latin/WordComposer.java

...utmethod/latin/spellcheck/AndroidSpellCheckerService.java

...id/inputmethod/latin/suggestions/MoreSuggestionsView.java

tests/src/com/android/inputmethod/latin/InputLogicTests.java