Don't recycle animating views, etc.

* And a few twiddles to ConversationCursor
* And make Conversation.delete/updateBoolean return
  a sequence number

Change-Id: I79867e1ce562246eabecfd1c4eff686647578503
diff --git a/src/com/android/mail/providers/UIProvider.java b/src/com/android/mail/providers/UIProvider.java
index b9f4879..d0547db 100644
--- a/src/com/android/mail/providers/UIProvider.java
+++ b/src/com/android/mail/providers/UIProvider.java
@@ -609,4 +609,7 @@
         ConversationColumns.MESSAGE_LIST_URI
     };
     public static final int UNDO_MESSAGE_LIST_COLUMN = 0;
+
+    // Parameter used to indicate the sequence number for an undoable operation
+    public static final String SEQUENCE_QUERY_PARAMETER = "seq";
 }