Support addtionalMoreKeys

This change also removes
  * Unused more_keys_for_q, w, and p.

Change-Id: Idb99e5f6d8c2ad2d28437f42b35b21c282cd181f
diff --git a/java/res/xml/rows_slavic.xml b/java/res/xml/rows_slavic.xml
index 52f5af4..71e442c 100644
--- a/java/res/xml/rows_slavic.xml
+++ b/java/res/xml/rows_slavic.xml
@@ -29,43 +29,46 @@
         <Key
             latin:keyLabel="й"
             latin:keyHintLabel="1"
-            latin:moreKeys="1" />
+            latin:additionalMoreKeys="1" />
         <Key
             latin:keyLabel="ц"
             latin:keyHintLabel="2"
-            latin:moreKeys="2" />
+            latin:additionalMoreKeys="2" />
         <Key
             latin:keyLabel="у"
             latin:keyHintLabel="3"
+            latin:additionalMoreKeys="3"
             latin:moreKeys="@string/more_keys_for_slavic_u" />
         <Key
             latin:keyLabel="к"
             latin:keyHintLabel="4"
-            latin:moreKeys="4" />
+            latin:additionalMoreKeys="4" />
         <Key
             latin:keyLabel="е"
             latin:keyHintLabel="5"
+            latin:additionalMoreKeys="5"
             latin:moreKeys="@string/more_keys_for_slavic_ye" />
         <Key
             latin:keyLabel="н"
             latin:keyHintLabel="6"
+            latin:additionalMoreKeys="6"
             latin:moreKeys="@string/more_keys_for_slavic_en" />
         <Key
             latin:keyLabel="г"
             latin:keyHintLabel="7"
-            latin:moreKeys="7" />
+            latin:additionalMoreKeys="7" />
         <Key
             latin:keyLabel="ш"
             latin:keyHintLabel="8"
-            latin:moreKeys="8" />
+            latin:additionalMoreKeys="8" />
         <Key
             latin:keyLabel="@string/keylabel_for_slavic_shcha"
             latin:keyHintLabel="9"
-            latin:moreKeys="9" />
+            latin:additionalMoreKeys="9" />
         <Key
             latin:keyLabel="з"
             latin:keyHintLabel="0"
-            latin:moreKeys="0" />
+            latin:additionalMoreKeys="0" />
         <Key
             latin:keyLabel="х"
             latin:moreKeys="@string/more_keys_for_slavic_ha"