override the override

[jjblum]

Current behavior: even if an autonomous behavior starts the return home action, if the RC override is on, the boat will not return home. In other words, the manual override cannot be overridden by the boat's autonomy.

Desired behavior: while the boat is returning home, the RC override is temporarily ignored. The phone autonomy sends a command to the arduino to override the override.

HOWEVER: imagine a scenario where the return home behavior puts the boat in peril and the operator tries to save it with RC steering, but can't because the boat ignores the command. Perhaps we need to two-level RC override, where if RC override as we currently know it is already on and you flip a second switch, this again overrides even the return home behavior.