Separate utility methods from BinaryDictionary in native code.

Bug: 8187060
Change-Id: I099de557d2aaee95c6b809450108139550e9b0aa
diff --git a/native/jni/NativeFileList.mk b/native/jni/NativeFileList.mk
index eb24df6..82237dc 100644
--- a/native/jni/NativeFileList.mk
+++ b/native/jni/NativeFileList.mk
@@ -15,6 +15,7 @@
 LATIN_IME_JNI_SRC_FILES := \
     com_android_inputmethod_keyboard_ProximityInfo.cpp \
     com_android_inputmethod_latin_BinaryDictionary.cpp \
+    com_android_inputmethod_latin_BinaryDictionaryUtils.cpp \
     com_android_inputmethod_latin_DicTraverseSession.cpp \
     jni_common.cpp