Cleanup <include/> and etc. in keyboard XML

* Remove keyXPos and keyWidth from key_*.xml and make it more generic.
* Add keyXPos and keyWidth to <include/> generalized key_*.xml.
* Remove zero width <Spacer/> and fold into successive <include/>.

Change-Id: I4b5c02a165ba0bc9ef8741be0b4938c1efaf5e27
diff --git a/java/res/xml-sw768dp/rows_phone.xml b/java/res/xml-sw768dp/rows_phone.xml
index 216fbed..b3b3521 100644
--- a/java/res/xml-sw768dp/rows_phone.xml
+++ b/java/res/xml-sw768dp/rows_phone.xml
@@ -106,8 +106,7 @@
         <Key
             latin:keyStyle="num9KeyStyle" />
         <!-- Note: This Spacer prevents the above key from being marked as a right edge key. -->
-        <Spacer
-            latin:keyWidth="0%p" />
+        <Spacer />
     </Row>
     <Row>
         <include
@@ -125,20 +124,9 @@
         <Key
             latin:keyLabel="#"
             latin:keyStyle="numKeyStyle" />
-        <switch>
-            <case
-                latin:shortcutKeyEnabled="true"
-            >
-                <Key
-                    latin:keyStyle="shortcutKeyStyle"
-                    latin:keyXPos="-8.047%p"
-                    latin:keyWidth="fillRight" />
-            </case>
-            <default>
-                <!-- Note: This Spacer prevents the above key from being marked as a right edge key. -->
-                <Spacer
-                    latin:keyWidth="0%p" />
-            </default>
-        </switch>
+        <include
+            latin:keyXPos="-8.047%p"
+            latin:keyWidth="fillRight"
+            latin:keyboardLayout="@xml/key_shortcut" />
     </Row>
 </merge>