Use Rest API calls

[diegolmello]

@RocketChat/ReactNative

i will test and give my findings, good work so far.

My feedback:

1. Overall the app looks a bit slow in doing actions as compared to the native kotlin android app. Like opening images, loading old chats , opening a room for first time. etc Why its not fast like fb messenger, when these both apps r on react native.

2. Long and fast scroll down on files attachment page still shows a blank white page. Unable to fully scroll to the end of the files attachments. it shows re scrolls mid way on top.

3. i tested these changes on 1.6.1.5184

4. Is this the same app for iOS react native too? or the iOS one is more stable? Which i0S version should we deploy for production, the native swift one for iOS or the react native one for iOS.?

5. It takes a bit long time to retrieve the old messages convo when opening a DM room for first time. but thankfully on new DMs , now the app is not crashing :)

6. There is a slight lag when i send the message and it get sent, may be i m being too optimistic and its just my network.

Over all good work, the only thing is lag in the overall app usage is bad for UX.

Once my team tests and give more feedback, i will update.