Move DictUpdater to the tests directory.

...id/inputmethod/latin/makedict/BinaryDictDecoderUtils.java

...id/inputmethod/latin/makedict/BinaryDictEncoderUtils.java

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

...m/android/inputmethod/latin/makedict/Ver2DictDecoder.java

...m/android/inputmethod/latin/makedict/Ver4DictDecoder.java

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

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

...inputmethod/latin/makedict/SparseTableContentUpdater.java

...m/android/inputmethod/latin/makedict/Ver4DictUpdater.java