Add delete button to Edit View

When a contact is deleted, QuickContacts is told by LoaderCallbacks
that it shouldn't be visible prior to onResume().

Change-Id: I5f9c84cbfefddca3722bd1de3c5a98760547ef0a
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 127d93b..06e52cf 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -168,8 +168,8 @@
     <!-- Confirmation dialog contents after users selects to delete a Writable contact. -->
     <string name="deleteConfirmation">This contact will be deleted.</string>
 
-    <!-- Menu item to indicate you want to stop editing a contact and NOT save the changes you've made [CHAR LIMIT=12] -->
-    <string name="menu_discard">Discard</string>
+    <!-- Menu item to indicate you want to stop editing a contact and NOT save the changes you've made [CHAR LIMIT=30] -->
+    <string name="menu_discard">Discard changes</string>
 
     <!-- Message displayed in a toast when you try to view the details of a contact that
          for some reason doesn't exist anymore. [CHAR LIMIT=NONE]-->