Make this constant final

Change-Id: I3fc5b575247f31c3ff486316c20afa93370bf29d
diff --git a/src/com/android/ex/chips/RecipientEditTextView.java b/src/com/android/ex/chips/RecipientEditTextView.java
index cea1988..eb13671 100644
--- a/src/com/android/ex/chips/RecipientEditTextView.java
+++ b/src/com/android/ex/chips/RecipientEditTextView.java
@@ -121,7 +121,7 @@
 
     private static final String TAG = "RecipientEditTextView";
 
-    private static int DISMISS = "dismiss".hashCode();
+    private static final int DISMISS = "dismiss".hashCode();
 
     private static final long DISMISS_DELAY = 300;