Add ru and sr keyboard layout for tablet

Bug: 3210174
Change-Id: Iea515345093027099689642946da505ddc6e53c6
diff --git a/java/res/xml-sr/kbd_qwerty.xml b/java/res/xml-sr/kbd_qwerty.xml
index 77e7647..279b040 100644
--- a/java/res/xml-sr/kbd_qwerty.xml
+++ b/java/res/xml-sr/kbd_qwerty.xml
@@ -86,7 +86,9 @@
             latin:keyLabel="ш"
             latin:keyEdgeFlags="right" />
     </Row>
-    <Row>
+    <Row
+        latin:keyWidth="8.333%p"
+    >
         <Key
             latin:keyLabel="а"
             latin:keyEdgeFlags="left" />