[wpilib] Set AnalogPotentiometer dashboard type (#2825)

There's not a specific dashboard type for potentiometers, so use analog input.

wpilibc/src/main/native/cpp/AnalogPotentiometer.cpp

@@ -44,6 +44,7 @@ double AnalogPotentiometer::Get() const {
 double AnalogPotentiometer::PIDGet() { return Get(); }
 
 void AnalogPotentiometer::InitSendable(SendableBuilder& builder) {
+  builder.SetSmartDashboardType("Analog Input");
   builder.AddDoubleProperty(
       "Value", [=]() { return Get(); }, nullptr);
 }