- removed GroupMessages API, groupchat messages are merged with messages. So where we used to have
GroupMessages.CONTENT_URI, now we have Messages.GROUP_MESSAGES_CONTENT_URI. Messages api now has a flag
IS_GROUP_CHAT to indicate that a message is a groupchat message.
- instead of storing 'provider', 'account', 'contact' in the messages table, store a 'thread_id' column instead.
thread_id is really just the contact_id for both messages and groupchat messages.
- add getContentUriByThreadId() api, for now, retained the old getContentUriByContact(), but it's deprecated.
b3624b9680