Android minor changes

Source/Android/app/src/main/res/values/strings.xml

@@ -248,6 +248,7 @@
     <string name="yes">Yes</string>
     <string name="no">No</string>
     <string name="ok">OK</string>
+    <string name="off">Off</string>
     <string name="cancel">Cancel</string>
     <string name="clear">Clear</string>
     <string name="disabled">Disabled</string>