Fetch and pass the bigram position on suggestions.

This is a cherry-pick of change I2d81742f

Bug: 6313806
Change-Id: Ic1190b7980d032bc11b57841bca040d980889b6b
diff --git a/native/jni/src/bigram_dictionary.h b/native/jni/src/bigram_dictionary.h
index 07e47f0..76f9039 100644
--- a/native/jni/src/bigram_dictionary.h
+++ b/native/jni/src/bigram_dictionary.h
@@ -27,8 +27,7 @@
     BigramDictionary(const unsigned char *dict, int maxWordLength, Dictionary *parentDictionary);
     int getBigrams(const int32_t *word, int length, int *codes, int codesSize,
             unsigned short *outWords, int *frequencies, int maxWordLength, int maxBigrams);
-    int getBigramListForWord(const uint8_t* const root,
-        const int32_t *prevWord, const int prevWordLength);
+    int getBigramListPositionForWord(const int32_t *prevWord, const int prevWordLength);
     ~BigramDictionary();
  private:
     bool addWordBigram(unsigned short *word, int length, int frequency);