Change to string refs for Enter

To allow for translation

res/values/strings.xml

@@ -420,6 +420,8 @@
     <string name="preferences__pref_all_mms_title">Use for all MMS</string> 
     <string name="preferences__use_textsecure_for_viewing_and_storing_all_incoming_text_messages">Use TextSecure for viewing and storing all incoming text messages</string>
     <string name="preferences__use_textsecure_for_viewing_and_storing_all_incoming_multimedia_messages">Use TextSecure for viewing and storing all incoming multimedia messages</string>
+    <string name="preferences__enable_enter_key_title">Enable Enter key</string>
+    <string name="preferences__replace_smiley_with_enter_key">Replace the smiley key with an enter key</string>
     <string name="preferences__pref_enter_sends_title">Enter sends</string>
     <string name="preferences__pressing_the_enter_key_will_send_text_messages">Pressing the enter key will send text messages</string>
     <string name="preferences__display_settings">Display Settings</string>