Add Khmer layout

bug: 6910993
Change-Id: Ie515acd625bc266494d9e63b0694e2c05a19b661
diff --git a/java/res/xml-sw600dp/rows_lao.xml b/java/res/xml-sw600dp/rows_lao.xml
index cfe8db9..446d9bd 100644
--- a/java/res/xml-sw600dp/rows_lao.xml
+++ b/java/res/xml-sw600dp/rows_lao.xml
@@ -55,8 +55,17 @@
             latin:keyWidth="10.0%p" />
         <include
             latin:keyboardLayout="@xml/rowkeys_lao4" />
-        <include
-            latin:keyboardLayout="@xml/keys_exclamation_question" />
+        <switch>
+            <case
+                latin:keyboardLayoutSetElement="alphabetManualShifted|alphabetShiftLocked|alphabetShiftLockShifted"
+            >
+                <Spacer />
+            </case>
+            <default>
+                <include
+                    latin:keyboardLayout="@xml/keys_exclamation_question" />
+            </default>
+        </switch>
     </Row>
     <include
         latin:keyboardLayout="@xml/row_qwerty4" />