[x] Did you test your change with either the sample apps that are included in the repository or with a blank app that uses your change?
Description
Currently, this SDK registers the devices as FCM Legacy registrations/installations on ANH. Google will stop supporting FCM Legacy HTTP on June 20, 2024.
This PR adds support for registering new devices as FCM V1 registrations/installations and migrating existing FCM registrations/installations to FCM V1.
Things to consider before you submit the PR:
Description
Currently, this SDK registers the devices as FCM Legacy registrations/installations on ANH. Google will stop supporting FCM Legacy HTTP on June 20, 2024.
This PR adds support for registering new devices as FCM V1 registrations/installations and migrating existing FCM registrations/installations to FCM V1.