Customizing distance sensor to add orientation for multiple sensor su…

…pport (#321)

* Customizing distance sensor to add orientaion for multiple sensor support

* Added orientation(Euler) parameter to telemetry.distance_sensor to take advantage of the mavlink orientation parameter and receive measurements for multiple distance sensors

protos/telemetry/telemetry.proto

@@ -742,6 +742,7 @@ message DistanceSensor {
     float minimum_distance_m = 1 [(mavsdk.options.default_value)="NaN"]; // Minimum distance the sensor can measure, NaN if unknown.
     float maximum_distance_m = 2 [(mavsdk.options.default_value)="NaN"]; // Maximum distance the sensor can measure, NaN if unknown.
     float current_distance_m = 3 [(mavsdk.options.default_value)="NaN"]; // Current distance reading, NaN if unknown.
+    EulerAngle orientation = 4; // Sensor Orientation reading.
 }
 
 // Scaled Pressure message type.