[SDK] [Android] Release v3.4.0

GitHub release
Integration guide
Upgrading to v3 guide

Changelog:

TL;DR: You can now support Huawei push notifications and you don’t need to change your setup if you’re not interested in it.

Please follow our Huawei integration guide to get started.

  • This version adds optional support for HCM, aka Huawei Push Kit.
  • FCM support, aka Firebase Cloud Messaging (previously GCM) is now modular and can be removed from your project’s dependencies explicitly using some Gradle kung fu.
    The main SDK library depends on it so that you don’t need to update your integration.