[HD03] Straighten out attribute key names in Java.

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

...droid/inputmethod/latin/makedict/AbstractDictDecoder.java

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

...m/android/inputmethod/latin/makedict/Ver4DictEncoder.java

...rsonalization/DecayingExpandableBinaryDictionaryBase.java

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

...roid/inputmethod/latin/BinaryDictionaryDecayingTests.java

...m/android/inputmethod/latin/makedict/BinaryDictUtils.java

.../inputmethod/latin/utils/UserHistoryDictIOUtilsTests.java

...tmethod/latin/dicttool/BinaryDictOffdeviceUtilsTests.java