Fix conversation loading

After loading a thread with an exact set of recipients, the code called
setRecipients() which resets the threadId to zero. As a result, a new
conversation was created and displayed, rather than the existing conversation
with all of its messages. Fixes bug 2284007.

Change-Id: I6b38a046120f320a95f5e63721ee3000290feb1c
diff --git a/src/com/android/mms/data/Conversation.java b/src/com/android/mms/data/Conversation.java
index e9bd1a0..9fb3b78 100644
--- a/src/com/android/mms/data/Conversation.java
+++ b/src/com/android/mms/data/Conversation.java
@@ -131,7 +131,6 @@
 
             long threadId = getOrCreateThreadId(context, recipients);
             conv = new Conversation(context, threadId);
-            conv.setRecipients(recipients);
 
             try {
                 Cache.put(conv);