Yet another small cleanups

...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

.../jni/com_android_inputmethod_latin_DicTraverseSession.cpp

...ve/jni/com_android_inputmethod_latin_DicTraverseSession.h

native/jni/jni_common.cpp