Start creating a Device Collection

Name it “All Android Devices” set limiting collection for “All Mobile Devices”

Create a Query Rule

Name it “All Android Devices”

Create a new Query

Use Simpel value Where ” Mobile Device OS Information – Platform” is %Andriod%”

Click Next

Click Close

Or use a script to create OS collection for iOS, Android and Windows Phone at the same time.

Onedrive link to Script