am f3cd38f2: GC step 5. Add large tests and fix bugs.

...cyimpl/dictionary/bigram/bigram_list_read_write_utils.cpp

...licyimpl/dictionary/bigram/bigram_list_read_write_utils.h

...licyimpl/dictionary/bigram/dynamic_bigram_list_policy.cpp

...l/dictionary/dynamic_patricia_trie_gc_event_listeners.cpp

...licyimpl/dictionary/dynamic_patricia_trie_node_reader.cpp

...cyimpl/dictionary/dynamic_patricia_trie_reading_utils.cpp

...licyimpl/dictionary/dynamic_patricia_trie_reading_utils.h

...yimpl/dictionary/dynamic_patricia_trie_writing_helper.cpp

...cyimpl/dictionary/dynamic_patricia_trie_writing_utils.cpp

...licyimpl/dictionary/dynamic_patricia_trie_writing_utils.h

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