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-sw768dp/rows_hebrew.xml b/java/res/xml-sw768dp/rows_hebrew.xml
index 476071a..e70f450 100644
--- a/java/res/xml-sw768dp/rows_hebrew.xml
+++ b/java/res/xml-sw768dp/rows_hebrew.xml
@@ -31,7 +31,9 @@
             latin:keyLabelFlags="alignLeft"
             latin:keyWidth="7.969%p" />
         <include
-            latin:keyboardLayout="@xml/keys_apostrophe_dash" />
+            latin:keyboardLayout="@xml/key_apostrophe" />
+        <include
+            latin:keyboardLayout="@xml/key_dash" />
         <include
             latin:keyboardLayout="@xml/rowkeys_hebrew1" />
         <Key