[Mobile] Playstore warning SafetyNet Attestation API is being discontinued

[KarinBerg]

In the last Playstore release we got the following warning from Google:
[Mobile] Playstore warning on last release 1.1.12 (29): The SafetyNet Attestation API is being discontinued and replaced by the new Play Integrity API

The developer of play-services-safetynet (com.google.android.gms:play-services-safetynet) added the following note to SDK version 18.0.0:
The SafetyNet Attestation API is being discontinued and replaced by the new Play Integrity API. Begin migration as soon as possible to avoid user disruption. The Play Integrity API includes all the integrity signals that SafetyNet Attestation offers and more, like Google Play licensing and better error messaging. Learn more and start migrating at https://developer.android.com/training/safetynet/deprecation-timeline

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