title: React Native Video Call Notification
body: <p>I am using react-native-agora for video calling app, i have successfully implemented the video calling function in react-native app. Now I want to show the user notification with Answer and Declined button, i have read out that react-native-callkeep will be helpful, but as i go through the docs, i found that it requires unnecessary permissions.
  I am using OneSignal to send notification, I just want the notification to keep vibrating/looping for some seconds untill the user decide to answer or decline the call.</p>