Use dynamic operations to construct all ver4 dicts.

...m/android/inputmethod/latin/AbstractDictionaryWriter.java

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

...m/android/inputmethod/latin/ContactsBinaryDictionary.java

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

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

...c/com/android/inputmethod/latin/UserBinaryDictionary.java

...droid/inputmethod/latin/inputlogic/InputLogicHandler.java

...c/com/android/inputmethod/latin/makedict/DictEncoder.java

...rsonalization/DecayingExpandableBinaryDictionaryBase.java