message: [FIX] GET /info to check if it's a valid server instead of x-instance-id
diff: import { AsyncStorage, Platform } from 'react-native';
  import foreach from 'lodash/forEach';
  -import RNFetchBlob from 'rn-fetch-blob';
  import * as SDK from '@rocket.chat/sdk';
  import reduxStore from './createStore';
  @@ -78,15 +77,11 @@ const RocketChat = {
  console.warn(`AsyncStorage error: ${ error.message }`);
  }
  },
  - _hasInstanceId(headers) {
  - return !!headers[Object.keys(headers).find(item => item.toLowerCase() === 'x-instance-id')];
  - },
  - async testServer(url) {
  + async testServer(server) {
  try {
  - let response = await RNFetchBlob.fetch('HEAD', url);
  - response = response.respInfo;
  - if (response.status === 200 && RocketChat._hasInstanceId(response.headers)) {
  - return url;
  + const result = await fetch(`${ server }/api/v1/info`).then(response => response.json());
  + if (result.success && result.info) {
  + return server;
  }
  } catch (e) {
  log('testServer', e);
  