Initial split QWERTY layout

Change [2/3]

Add an attribute that's used in layout xmls for specifying
the split-keyboard layout.
This attribute will be checked/set by the KeyboardBuilder which knows about
the "splittability" of the keyboard.

Bug: 4968173
Change-Id: I5d792e570b9648e09022e9b7e92a972a161009ee
diff --git a/java/res/xml/rowkeys_qwerty2.xml b/java/res/xml/rowkeys_qwerty2.xml
index 4077bea..550db3b 100644
--- a/java/res/xml/rowkeys_qwerty2.xml
+++ b/java/res/xml/rowkeys_qwerty2.xml
@@ -21,30 +21,10 @@
 <merge
     xmlns:latin="http://schemas.android.com/apk/res/com.android.inputmethod.latin"
 >
-    <Key
-        latin:keySpec="a"
-        latin:moreKeys="!text/morekeys_a" />
-    <Key
-        latin:keySpec="s"
-        latin:moreKeys="!text/morekeys_s" />
-    <Key
-        latin:keySpec="d"
-        latin:moreKeys="!text/morekeys_d" />
-    <Key
-        latin:keySpec="f" />
-    <Key
-        latin:keySpec="g"
-        latin:moreKeys="!text/morekeys_g" />
-    <Key
-        latin:keySpec="h"
-        latin:moreKeys="!text/morekeys_h" />
-    <Key
-        latin:keySpec="j"
-        latin:moreKeys="!text/morekeys_j" />
-    <Key
-        latin:keySpec="k"
-        latin:moreKeys="!text/morekeys_k" />
-    <Key
-        latin:keySpec="l"
-        latin:moreKeys="!text/morekeys_l" />
+    <!-- a,s,d,f,g -->
+    <include
+        latin:keyboardLayout="@xml/rowkeys_qwerty2_left5" />
+    <!-- h,j,k,l -->
+    <include
+        latin:keyboardLayout="@xml/rowkeys_qwerty2_right4" />
 </merge>