Remove search2 package and put everything into search

Change-Id: Ie8651c79ef023f154cd7120a88a20f3481abce2b
Fixes: 38502743
Test: make RunSettingsRoboTests
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index b04c8ab..649c14f 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -206,7 +206,7 @@
             </intent-filter>
         </activity>
 
-        <activity android:name=".search2.SearchActivity"
+        <activity android:name=".search.SearchActivity"
                   android:label="@string/search_settings"
                   android:icon="@drawable/ic_search_history"
                   android:parentActivityName="Settings">