timeline 1/11/2020 , check google mail below :
Hello Google Play Developer,
With the introduction of Jetpack WorkManager, weβre focusing on offering you a single go-to solution to background job scheduling on Android and are excited about the improvements in stability and the features it will bring. Read more in our recent blog post.
Starting November 1, 2020, GCMNetworkManager client libraries will be deprecated and no longer supported.
Our records indicate that you have used this API in the last 6 months, and we want to help ensure that you can continue to take advantage of background job scheduling in your app.
Note: FirebaseJobDispatcher (FJD) relies on GcmNetworkManager libraries and has already been deprecated.
To confirm that you currently do use FJD / GcmNetworkManager, please inspect your project code:
FJD:
com.firebase:firebase-jobdispatcher in your project dependencies
GcmNetworkManager
com.google.android.gms:play-services-gcm in your project dependencies AND
Use of com.google.android.gms.gcm.GcmNetworkManager in your code.
Once your app targets a future version of Android (> Android 10), GCMNetworkManager API calls via GcmNetworkManager or FJD client libraries will no longer work on devices running Android M and above.
Action required:
Please migrate to Jetpack WorkManager for your background job scheduling needs. We understand that code changes will be required, and we encourage you to factor in time for adequate testing as well.
Migration resources:
Migrating from FJD
Migrating from GcmNetworkManager
Please report feature requests and any issues you face while migrating to Jetpack WorkManager via the public issue tracker.