To be able to send push notifications to Android devices, you need to provide the correct vasco-notifications-android.properties, and google-services.json files in the \CustomizationTool\input\conf folder.
In vasco-notifications-android.properties file, you need to define the following elements:
notificationIconName: This element is the name of a PNG file in the \CustomizationTool\input\img folder.
The notification icon must be alpha-only. If this is not the case, the notification icon will not be displayed correctly.
The google-services.json file must be retrieve from your Firebase console project, in your project console settings, under the General tab.