I was able to retrieve telemetry data using a Raspberry Pi with Olympe, and it works very well.
I would now like to retrieve telemetry data and send waypoints and mission commands without using any additional hardware, using only the Android tablet.
Is this possible? Can I use the GroundSDK alongside FreeFlight?
You cannot use another GroundSDK application alongside FreeFlight 8 because the drone only accepts one active ARSDK connection at a time. To use GroundSDK on an Android tablet, you would need to develop your own app and use it instead of FreeFlight.
As an alternative, depending on the kind of telemetry you need and the waypoints you want to send, you can develop an Air SDK mission. This runs directly on the drone and works perfectly alongside FreeFlight 8.