Great, thanks Microsoft! I have policies, compliance and apps deploy for Android based on whether the device is Android for Work (and therefore has personal data) or whether the device is Android Enterprise (and therefore is fully owned and managed). The distinction in the OStype was an easy method for us to perform management on these two user types. We have a lot of configuration dependent on this which we will now have to unpick - why the change? If you want a dynamic group for all Android target where OSType match Android (this would return Android for work and Android enterprise) if you wanted just the fully managed devices, target match to AndroidEnterprise.
i hope there is an alternative coming e.g. Profile name (similar to how DEP or Autopilot can be detected)