OneSignal integration

OneSignal is a high volume and reliable push notification service for websites and mobile applications. To know more about onesignal follow this link - https://onesignal.com/

Follow this link to configure onesignal in your app https://documentation.onesignal.com/docs/android-sdk-setup

Place your OneSignal App ID in build.gradle(Module:app) file in the project

manifestPlaceholders = [
        onesignal_app_id : 'PLACE YOUR ONESIGNAL APP ID HERE',        // Project number pulled from dashboard, local value is ignored.        onesignal_google_project_number: 'REMOTE']

Replace your generated google-service.json inside App Directory in project