Fix auto correction threshold values array reference

This change also removes unused argument from Suggest.getSuggestions().

Change-Id: I512f8695d22898bb906e136a66e0ee6b521cd1d1
diff --git a/java/res/xml/prefs.xml b/java/res/xml/prefs.xml
index 1bc3395..0eee060 100644
--- a/java/res/xml/prefs.xml
+++ b/java/res/xml/prefs.xml
@@ -106,9 +106,9 @@
             android:title="@string/auto_correction"
             android:summary="@string/auto_correction_summary"
             android:persistent="true"
-            android:entryValues="@array/auto_correction_threshold_mode_values"
+            android:entryValues="@array/auto_correction_threshold_mode_indexes"
             android:entries="@array/auto_correction_threshold_modes"
-            android:defaultValue="@string/auto_correction_threshold_mode_value_modest"
+            android:defaultValue="@string/auto_correction_threshold_mode_index_modest"
             />
 
         <CheckBoxPreference