Fix native method signature

Change-Id: Ia2d566f162f746c6b2b2b874f7278d86abd9e839

java/src/com/android/inputmethod/latin/utils/LanguageModelParam.java

@@ -25,7 +25,9 @@ import com.android.inputmethod.latin.settings.SpacingAndPunctuations;
 import java.util.ArrayList;
 import java.util.Locale;
 
-public class LanguageModelParam {
+// Note: this class is used as a parameter type of a native method. You should be careful when you
+// rename this class or field name. See BinaryDictionary#addMultipleDictionaryEntriesNative().
+public final class LanguageModelParam {
     private static final String TAG = LanguageModelParam.class.getSimpleName();
     private static final boolean DEBUG = false;
     private static final boolean DEBUG_TOKEN = false;

native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp

@@ -541,7 +541,7 @@ static const JNINativeMethod sMethods[] = {
     {
         const_cast<char *>("addMultipleDictionaryEntriesNative"),
         const_cast<char *>(
-                "(J[Lcom/android/inputmethod/latin/BinaryDictionary$LanguageModelParam;I)I"),
+                "(J[Lcom/android/inputmethod/latin/utils/LanguageModelParam;I)I"),
         reinterpret_cast<void *>(latinime_BinaryDictionary_addMultipleDictionaryEntries)
     },
     {