Slightly wider space key for 10-inch tablet layouts

This change also removes the usage of "fillBoth" keyWidth from 10-inch
tablet layouts.

Change-Id: Ie6844fc096712daa24e09b3d67dde48d1c03eb46
diff --git a/java/res/xml-sw768dp/key_space.xml b/java/res/xml-sw768dp/key_space.xml
index 36326c4..8968f08 100644
--- a/java/res/xml-sw768dp/key_space.xml
+++ b/java/res/xml-sw768dp/key_space.xml
@@ -27,7 +27,7 @@
         >
             <Key
                 latin:keyStyle="spaceKeyStyle"
-                latin:keyWidth="29.453%p" />
+                latin:keyWidth="32.188%p" />
             <!-- U+200C: "" ZERO WIDTH NON-JOINER
                  U+200D: "" ZERO WIDTH JOINER -->
             <Key
@@ -36,7 +36,7 @@
         <default>
             <Key
                 latin:keyStyle="spaceKeyStyle"
-                latin:keyWidth="37.500%p" />
+                latin:keyWidth="40.235%p" />
         </default>
     </switch>
 </merge>