Modularize keyboard XML files

* Remove duplicated xml-sw768dp/keys_apostrophe_dash.xml
* Separate keys_apostrophe_dash.xml to key_apostorhe.xml and
  key_dash.ml
* Separate key_space.xml from row_qwerty4.xml
* Separate key_f1.xml from xml{,-sw600dp}/row_qwerty4.xml
* Separate keys_f1f2.xml from xml-sw768dp/row_qwerty4.xml
* Fix incorrectly named rows_symbols{,_shift}4.xml to
  row_symbols{,_shift}4.xml

Change-Id: Id71967a016a348174d1fc265b654dbc233c6562e
diff --git a/java/res/xml/key_space.xml b/java/res/xml/key_space.xml
new file mode 100644
index 0000000..02ee42f
--- /dev/null
+++ b/java/res/xml/key_space.xml
@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 2012, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+-->
+
+<merge
+    xmlns:latin="http://schemas.android.com/apk/res/com.android.inputmethod.latin"
+>
+    <switch>
+        <case
+            latin:languageCode="fa"
+            latin:languageSwitchKeyEnabled="true"
+        >
+            <Key
+                latin:keyStyle="languageSwitchKeyStyle" />
+            <Key
+                latin:keyStyle="spaceKeyStyle"
+                latin:keyWidth="30%p" />
+            <Key
+                latin:keyStyle="zwnjKeyStyle" />
+        </case>
+        <case
+            latin:languageCode="fa"
+            latin:languageSwitchKeyEnabled="false"
+        >
+            <Key
+                latin:keyStyle="spaceKeyStyle"
+                latin:keyWidth="40%p" />
+            <Key
+                latin:keyStyle="zwnjKeyStyle" />
+        </case>
+        <case
+            latin:languageSwitchKeyEnabled="true"
+        >
+            <Key
+                latin:keyStyle="languageSwitchKeyStyle" />
+            <Key
+                latin:keyStyle="spaceKeyStyle"
+                latin:keyWidth="40%p" />
+        </case>
+        <!-- languageSwitchKeyEnabled="false" -->
+        <default>
+            <Key
+                latin:keyStyle="spaceKeyStyle"
+                latin:keyWidth="50%p" />
+        </default>
+    </switch>
+</merge>