[wpilib] Prefix all NI DS specific controller classes (#8596)

Easier then the last one that put everything in a sub namespace. By
prefixing the name less things break, and intellisense will be less
confusing to new users during the transition.

wpilibcExamples/src/main/cpp/templates/commandv2/cpp/RobotContainer.cpp

@@ -23,9 +23,9 @@ void RobotContainer::ConfigureBindings() {
     return m_subsystem.ExampleCondition();
   }).OnTrue(ExampleCommand(&m_subsystem).ToPtr());
 
-  // Schedule `ExampleMethodCommand` when the Xbox controller's B button is
+  // Schedule `ExampleMethodCommand` when the Gamepad's East Face button is
   // pressed, cancelling on release.
-  m_driverController.B().WhileTrue(m_subsystem.ExampleMethodCommand());
+  m_driverController.EastFace().WhileTrue(m_subsystem.ExampleMethodCommand());
 }
 
 wpi::cmd::CommandPtr RobotContainer::GetAutonomousCommand() {

wpilibcExamples/src/main/cpp/templates/commandv2/include/RobotContainer.hpp

@@ -7,7 +7,7 @@
 #include "Constants.hpp"
 #include "subsystems/ExampleSubsystem.hpp"
 #include "wpi/commands2/CommandPtr.hpp"
-#include "wpi/commands2/button/CommandXboxController.hpp"
+#include "wpi/commands2/button/CommandGamepad.hpp"
 
 /**
  * This class is where the bulk of the robot should be declared.  Since
@@ -24,7 +24,7 @@ class RobotContainer {
 
  private:
   // Replace with CommandPS4Controller or CommandJoystick if needed
-  wpi::cmd::CommandXboxController m_driverController{
+  wpi::cmd::CommandGamepad m_driverController{
       OperatorConstants::kDriverControllerPort};
 
   // The robot's subsystems are defined here...