Arm may be in unexpected state at start of autonomous

[nlaverdure]

Arm may be in unexpected state at start of autonomous if there has not been a rio reboot since the last teleoperated operation. Reset the arm state during autonomousInit to ensure the arm matches the expected state.

[jlbabilino]

When our code was crashing during auto at Portsmouth, the code restarted, and the arm attempted to extend beyond the physical limit. Fortunately, the mechanical hardstop prevented damage.