Fix label of switch to symbols key when symbols has shortcut key

This change fixes the labels of switch to symbols key and switch back
from more symbols key when symbols layout has shortcut key.

Change-Id: I3fbbef2d929486d0f0542f4d89cb086d9f5bad82
diff --git a/java/res/values/attrs.xml b/java/res/values/attrs.xml
index 3eb27e7..2f1a209 100644
--- a/java/res/values/attrs.xml
+++ b/java/res/values/attrs.xml
@@ -389,6 +389,7 @@
         <attr name="passwordInput" format="boolean" />
         <attr name="clobberSettingsKey" format="boolean" />
         <attr name="shortcutKeyEnabled" format="boolean" />
+        <attr name="shortcutKeyOnSymbols" format="boolean" />
         <attr name="hasShortcutKey" format="boolean" />
         <attr name="languageSwitchKeyEnabled" format="boolean" />
         <attr name="isMultiLine" format="boolean" />