Failed to set waypoints for PX4

I tried sending waypoints to PX4 from Tower thinking maybe this base Mavlink functionality would be supported, but the waypoints were not registered. While searching the dronekit sources I found that the PX4 profile is basically empty.

The PX4 profile source I'm referring to is:
.../ServiceApp/src/org/droidplanner/services/android/core/drone/autopilot/apm/ArduPilot.java

I'm interested in this functionality and can give a hand in testing.