Rename SimDeviceEncoderMediator.java to CANEncoderMediator.java.

Rename SimDeviceMotorMediator.java to CANMotorMediator.java.

Add DutyCycleMediator.java to handle SparkMaxAbsoluteEncoder and CANCoder devices.

Add AnalogInputMediator.java to handle SparkMaxAnalogSensor devices.

Currently passes system test but that doesn't test any of the new functionality.

 into fix-to-work-with-compliant-can-sims

Rename AnalogInputMediator -> AnalogInputEncoderMediator.

Fix prefix CANMotorMediator uses to detect a Spark controller.

Make CANMotorMediator set sim busVoltage = 12.