Enables the GCM channel for an application or updates the status and settings of the GCM channel for an application.
See https://www.paws-r-sdk.com/docs/pinpoint_update_gcm_channel/ for full documentation.
pinpoint_update_gcm_channel(ApplicationId, GCMChannelRequest)
[required] The unique identifier for the application. This identifier is displayed as the Project ID on the Amazon Pinpoint console.
[required]