store static fields of the system message in parameters

[BluemarkInnovations]

The purpose of this PR is to store the static fields of the System message in parameters. These values are unlikely to change during the lifetime of an UAV in a typical application scenario. This has some advantages:

• it would allow to implement only the system update message instead of the full system message. It would also save bandwidth from the GCS/flight controller to the Remote ID module as only the system update messages are required.
• in cases where the Remote ID module only receives system update messages, it can use the values from parameters to generate a full Remote ID system message. Such situation may occur if the Remote ID module reboots unexpectedly during flight.

This PR automatically updates these parameter values if a new System message is received with different values.