[Refactor] Divide BinaryDictInputOutput into BinaryDictEncoder and BinaryDictDecoder.

...com/android/inputmethod/latin/BinaryDictionaryGetter.java

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

...android/inputmethod/latin/makedict/BinaryDictDecoder.java

...android/inputmethod/latin/makedict/BinaryDictEncoder.java

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

.../android/inputmethod/latin/makedict/BinaryDictReader.java

.../inputmethod/latin/makedict/DynamicBinaryDictIOUtils.java

...com/android/inputmethod/latin/utils/ByteArrayWrapper.java

...droid/inputmethod/latin/utils/UserHistoryDictIOUtils.java

native/jni/Android.mk

..._android_inputmethod_latin_makedict_BinaryDictDecoder.cpp

...om_android_inputmethod_latin_makedict_BinaryDictDecoder.h

native/jni/jni_common.cpp

native/jni/src/suggest/core/dictionary/probability_utils.h

...tmethod/latin/makedict/BinaryDictDecoderEncoderTests.java

...id/inputmethod/latin/makedict/BinaryDictIOUtilsTests.java

...oid/inputmethod/latin/makedict/BinaryDictReaderTests.java

tools/dicttool/NativeLib.mk

.../inputmethod/latin/dicttool/BinaryDictOffdeviceUtils.java

...m/android/inputmethod/latin/dicttool/DictionaryMaker.java