Move decoder specific constants to DecoderSpecificConstants.java

...n/src/com/android/inputmethod/latin/common/Constants.java

...id/inputmethod/latin/define/DecoderSpecificConstants.java

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

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

...android/inputmethod/latin/ExpandableBinaryDictionary.java

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

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

...rc/com/android/inputmethod/latin/RichInputConnection.java

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

...rc/com/android/inputmethod/latin/makedict/FormatSpec.java

...utmethod/latin/personalization/UserHistoryDictionary.java

.../android/inputmethod/latin/utils/DictionaryInfoUtils.java

...om/android/inputmethod/latin/utils/NgramContextUtils.java

...tmethod/latin/utils/WordInputEventForPersonalization.java

.../com/android/inputmethod/latin/BinaryDictionaryTests.java

...android/inputmethod/latin/makedict/BinaryDictIOUtils.java

.../android/inputmethod/latin/makedict/FusionDictionary.java