Don't auto-set thread to read on send.

src/org/thoughtcrime/securesms/database/MmsDatabase.java

@@ -365,7 +365,6 @@ public class MmsDatabase extends Database {
     contentValues.put(DATE_RECEIVED, contentValues.getAsLong(DATE_SENT));
 
     long messageId = insertMediaMessage(sendRequest, contentValues);
-    DatabaseFactory.getThreadDatabase(context).setRead(threadId);
     Trimmer.trimThread(context, threadId);
 
     return messageId;

src/org/thoughtcrime/securesms/database/SmsDatabase.java

@@ -235,7 +235,6 @@ public class SmsDatabase extends Database {
     SQLiteDatabase db = databaseHelper.getWritableDatabase();
     long messageId    = db.insert(TABLE_NAME, ADDRESS, contentValues);
 
-    DatabaseFactory.getThreadDatabase(context).setRead(threadId);
     DatabaseFactory.getThreadDatabase(context).update(threadId);
     notifyConversationListeners(threadId);
     Trimmer.trimThread(context, threadId);