Remove language switch key from symbols and symbols shift keyboard

This change also fixes the background color of the left keys of the space key.

Bug: 12407208
Change-Id: Id869605146e9f72835f892c3c7ae14f118177394
diff --git a/java/res/xml/rows_symbols.xml b/java/res/xml/rows_symbols.xml
index d0606c6..6fd876f 100644
--- a/java/res/xml/rows_symbols.xml
+++ b/java/res/xml/rows_symbols.xml
@@ -54,6 +54,7 @@
     </Row>
     <Row
         latin:keyWidth="10%p"
+        latin:backgroundType="functional"
     >
         <Key
             latin:keyStyle="toAlphaKeyStyle"