EKF: range_finder parameterize range sensor quality hysteresis time

Signed-off-by: Claudio Micheli <claudio@auterion.com>
Co-authored-by: bresch <brescianimathieu@gmail.com>

EKF/common.h

@@ -291,6 +291,7 @@ struct parameters {
 	float max_vel_for_range_aid{1.0f};	///< maximum ground velocity for which we allow to use the range finder as height source (if range_aid == 1)
 	int32_t range_aid{0};			///< allow switching primary height source to range finder if certain conditions are met
 	float range_aid_innov_gate{1.0f}; 	///< gate size used for innovation consistency checks for range aid fusion
+	float range_valid_quality_s{1.0f};	///< minimum duration during which the reported range finder signal quality needs to be non-zero in order to be declared valid (s)
 	float range_cos_max_tilt{0.7071f};	///< cosine of the maximum tilt angle from the vertical that permits use of range finder and flow data
 
 	// vision position fusion