Add a functionality to limit the max correction errors

Before
==== test finished, terminate logcat =====
(0)  121.97 (0.28%)
(1)  42032.07 (95.46%)
(2)  11.03 (0.03%)
(3)  12.19 (0.03%)
(4)  10.02 (0.02%)
(5)  1417.41 (3.22%)
(6)  258.43 (0.59%)
(20) 50.20 (0.11%)
Total 44033.07 (sum of others 43913.32)

After
==== test finished, terminate logcat =====
(0)  110.81 (0.29%)
(1)  36416.11 (94.47%)
(2)  10.06 (0.03%)
(3)  9.45 (0.02%)
(4)  9.83 (0.03%)
(5)  1535.52 (3.98%)
(6)  290.25 (0.75%)
(20) 40.57 (0.11%)
Total 38546.83 (sum of others 38422.60)

Change-Id: Iffd24ce0b2dc422c8c6085d5be5f6bfdaf59ca7d
diff --git a/native/src/unigram_dictionary.h b/native/src/unigram_dictionary.h
index 0b01265..f5cb438 100644
--- a/native/src/unigram_dictionary.h
+++ b/native/src/unigram_dictionary.h
@@ -61,6 +61,10 @@
     static const int FLAG_ATTRIBUTE_ADDRESS_TYPE_TWOBYTES = 0x20;
     static const int FLAG_ATTRIBUTE_ADDRESS_TYPE_THREEBYTES = 0x30;
 
+    // Error tolerances
+    static const int DEFAULT_MAX_ERRORS = 2;
+    static const int MAX_ERRORS_FOR_TWO_WORDS = 1;
+
     UnigramDictionary(const uint8_t* const streamStart, int typedLetterMultipler,
             int fullWordMultiplier, int maxWordLength, int maxWords, int maxProximityChars,
             const bool isLatestDictVersion);