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_qwerty1.xml b/java/res/xml/rowkeys_qwerty1.xml
index 8f3b160..b8e4a4c 100644
--- a/java/res/xml/rowkeys_qwerty1.xml
+++ b/java/res/xml/rowkeys_qwerty1.xml
@@ -21,53 +21,10 @@
 <merge
     xmlns:latin="http://schemas.android.com/apk/res/com.android.inputmethod.latin"
 >
-    <Key
-        latin:keySpec="!text/keyspec_q"
-        latin:keyHintLabel="1"
-        latin:additionalMoreKeys="1"
-        latin:moreKeys="!text/morekeys_q" />
-    <Key
-        latin:keySpec="!text/keyspec_w"
-        latin:keyHintLabel="2"
-        latin:additionalMoreKeys="2"
-        latin:moreKeys="!text/morekeys_w" />
-    <Key
-        latin:keySpec="e"
-        latin:keyHintLabel="3"
-        latin:additionalMoreKeys="3"
-        latin:moreKeys="!text/morekeys_e" />
-    <Key
-        latin:keySpec="r"
-        latin:keyHintLabel="4"
-        latin:additionalMoreKeys="4"
-        latin:moreKeys="!text/morekeys_r" />
-    <Key
-        latin:keySpec="t"
-        latin:keyHintLabel="5"
-        latin:additionalMoreKeys="5"
-        latin:moreKeys="!text/morekeys_t" />
-    <Key
-        latin:keySpec="!text/keyspec_y"
-        latin:keyHintLabel="6"
-        latin:additionalMoreKeys="6"
-        latin:moreKeys="!text/morekeys_y" />
-    <Key
-        latin:keySpec="u"
-        latin:keyHintLabel="7"
-        latin:additionalMoreKeys="7"
-        latin:moreKeys="!text/morekeys_u" />
-    <Key
-        latin:keySpec="i"
-        latin:keyHintLabel="8"
-        latin:additionalMoreKeys="8"
-        latin:moreKeys="!text/morekeys_i" />
-    <Key
-        latin:keySpec="o"
-        latin:keyHintLabel="9"
-        latin:additionalMoreKeys="9"
-        latin:moreKeys="!text/morekeys_o" />
-    <Key
-        latin:keySpec="p"
-        latin:keyHintLabel="0"
-        latin:additionalMoreKeys="0" />
+    <!-- q,w,e,r,t -->
+    <include
+        latin:keyboardLayout="@xml/rowkeys_qwerty1_left5" />
+    <!-- y,u,i,o,p -->
+    <include
+        latin:keyboardLayout="@xml/rowkeys_qwerty1_right5" />
 </merge>