Default Minimum Alt Constraint Hardcoded

[billbonney]

I think the defaultMinimumAlt needs to be configurable based on a user settings

dronekit-android/ClientLib/src/main/java/org/droidplanner/services/android/impl/core/drone/variables/GuidedPoint.java

Line 361 in 4c31ca3

public static float getDefaultMinAltitude(MavLinkDrone drone) {

The current setup would allow a VTOL craft to be set to 0, but a plane can only e set to 15m. A better setup would to allow a ROVER to be set to zero, and all others a user settle minimum.

(PS, you can assign it to me to fix)

[m4gr3d]

@billbonney The returned value is only used at initialization, and after initialization, any altitude value can be set.
For example, in Tower a user can define the vehicle min/max/default altitude through Settings -> Advanced Settings -> Altitude Preferences. After GUIDED mode is initialized, the user is able to send the vehicle an altitude within the defined bounds.