Refactoring: extract PtNode array reading logic form helper.

native/jni/NativeFileList.mk

...tionary/structure/pt_common/dynamic_pt_reading_helper.cpp

...ictionary/structure/pt_common/dynamic_pt_reading_helper.h

...mpl/dictionary/structure/pt_common/pt_node_array_reader.h

...olicyimpl/dictionary/structure/pt_common/pt_node_params.h

.../dictionary/structure/v4/ver4_patricia_trie_node_writer.h

...mpl/dictionary/structure/v4/ver4_patricia_trie_policy.cpp

...yimpl/dictionary/structure/v4/ver4_patricia_trie_policy.h

...ionary/structure/v4/ver4_patricia_trie_writing_helper.cpp

...mpl/dictionary/structure/v4/ver4_pt_node_array_reader.cpp

...yimpl/dictionary/structure/v4/ver4_pt_node_array_reader.h