Revert "Remove testing strings", which broke the Email2 build.

This reverts commit e16bf44c26c64d38be6f473b0e9aae8dd9bbc164.

Change-Id: I165063aa559a614df37b67bee3bcea45910e84a2
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 2b51ef7..a726c67 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -379,6 +379,13 @@
     <!-- Search Results: Text for header that is shown above search results [CHAR LIMIT=30] -->
     <string name="search_results_header">Results</string>
 
+    <string name="searchMode" translate="false">Search Mode</string>
+    <string name="searchConversationMode" translate="false">Search Conversation Mode</string>
+    <string name="setBackButton" translate="false">Set Back Button</string>
+    <string name="removeBackButton" translate="false">Remove Back Button</string>
+    <string name="normalMode" translate="false">Set Normal Mode</string>
+    <string name="searchResultMode" translate="false">Search Result Mode</string>
+    <string name="labelMode" translate="false">Set Label Mode</string>
     <!-- Search Results: Text for header that is shown above search results, while waiting for search results from the server [CHAR LIMIT=30] -->
     <string name="search_results_searching_header">Searching\u2026</string>