Merge "Clean up in LatinIME native code"

native/Android.mk

...ve/jni/com_android_inputmethod_keyboard_ProximityInfo.cpp

native/jni/com_android_inputmethod_keyboard_ProximityInfo.h

...ve/jni/com_android_inputmethod_latin_BinaryDictionary.cpp

native/jni/com_android_inputmethod_latin_BinaryDictionary.h

native/jni/jni_common.cpp

native/jni/jni_common.h

native/src/bigram_dictionary.h

native/src/char_utils.h

native/src/debug.h

native/src/dictionary.h

native/src/proximity_info.cpp

native/src/proximity_info.h

native/src/unigram_dictionary.h