Add supports multiple folders to account.

Change-Id: I9378e2b5ee10a60fc22901fc362f098c9e8506d6
diff --git a/src/com/android/mail/providers/UIProvider.java b/src/com/android/mail/providers/UIProvider.java
index 0e2b02e..2a0f995 100644
--- a/src/com/android/mail/providers/UIProvider.java
+++ b/src/com/android/mail/providers/UIProvider.java
@@ -81,6 +81,7 @@
         public static final int SMART_REPLY = 0x0200;
         public static final int LOCAL_SEARCH = 0x0400;
         public static final int THREADED_CONVERSATIONS = 0x0800;
+        public static final int MULTIPLE_FOLDERS_PER_CONV = 0x1000;
     }
 
     public static final class AccountColumns {