Good bye the proximity logic in Java code

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

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

...ve/jni/com_android_inputmethod_latin_BinaryDictionary.cpp

native/src/bigram_dictionary.cpp

native/src/bigram_dictionary.h

native/src/dictionary.cpp

native/src/dictionary.h

native/src/unigram_dictionary.cpp

native/src/unigram_dictionary.h