Make tablet search work correctly.

Change-Id: Ib19dcc590fd80aa134aa3afab9989eeac2aec224
diff --git a/src/com/android/mail/ui/OnePaneController.java b/src/com/android/mail/ui/OnePaneController.java
index e655b27..57616d8 100644
--- a/src/com/android/mail/ui/OnePaneController.java
+++ b/src/com/android/mail/ui/OnePaneController.java
@@ -266,4 +266,9 @@
                 FragmentManager.POP_BACK_STACK_INCLUSIVE);
         resetActionBarIcon();
     }
+
+    @Override
+    public boolean shouldShowFirstConversation() {
+        return false;
+    }
 }