Receiving incoming call in background on IOS 14

[vuletuanbt]

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
 ...
  RCTBridge *bridge = [[RCTBridge alloc] initWithDelegate:self launchOptions:launchOptions];
  _rnTwilioVoice = [bridge moduleForClass:[RNTwilioVoice class]];
  [_rnTwilioVoice initPushRegistry];
  [_rnTwilioVoice reRegisterWithTwilioVoice];

    NSDictionary *configCallkit = @{@"appName": @"AppName"};
  [_rnTwilioVoice configCallKit:configCallkit];

  // ---  Voip Push Notification
  // ===== (THIS IS OPTIONAL BUT RECOMMENDED) =====
  // --- register VoipPushNotification here ASAP rather than in JS. Doing this from the JS side may be too slow for some use cases
  // --- see: https://github.com/react-native-webrtc/react-native-voip-push-notification/issues/59#issuecomment-691685841
  [RNVoipPushNotificationManager voipRegistration];
  ...
  return YES;
}