Camera: allow camera managed by an autopilot

By querying autopilot for the CAMERA_INFORMATION message, we allow an
autopilot to be a proxy for a MAVLink or non-MAVLink camera.

The idea is similar to a gimbal manager implemented by an autopilot.

src/Camera/QGCCameraManager.cc

@@ -69,7 +69,8 @@ void
 QGCCameraManager::_mavlinkMessageReceived(const mavlink_message_t& message)
 {
     //-- Only pay attention to camera components, as identified by their compId
-    if(message.sysid == _vehicle->id() && (message.compid >= MAV_COMP_ID_CAMERA && message.compid <= MAV_COMP_ID_CAMERA6)) {
+    if(message.sysid == _vehicle->id() && (message.compid == MAV_COMP_ID_AUTOPILOT1 ||
+        (message.compid >= MAV_COMP_ID_CAMERA && message.compid <= MAV_COMP_ID_CAMERA6))) {
         switch (message.msgid) {
             case MAVLINK_MSG_ID_CAMERA_CAPTURE_STATUS:
                 _handleCaptureStatus(message);