[developerRobot] Add an OpModeRobot instance to DeveloperRobot (#8891)

You can switch to it just by switching Main.java

developerRobot/src/main/java/wpilib/robot/DefaultAutoMode.java

@@ -0,0 +1,24 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+package wpilib.robot;
+
+import org.wpilib.opmode.Autonomous;
+import org.wpilib.opmode.PeriodicOpMode;
+
+@Autonomous
+public class DefaultAutoMode extends PeriodicOpMode {
+  @SuppressWarnings("unused")
+  private final OpRobot robot;
+
+  public DefaultAutoMode(OpRobot robot) {
+    this.robot = robot;
+  }
+
+  @Override
+  public void start() {}
+
+  @Override
+  public void periodic() {}
+}

developerRobot/src/main/java/wpilib/robot/DefaultTeleMode.java

@@ -0,0 +1,26 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+package wpilib.robot;
+
+import org.wpilib.driverstation.DefaultUserControls;
+import org.wpilib.opmode.PeriodicOpMode;
+import org.wpilib.opmode.Teleop;
+
+@Teleop
+public class DefaultTeleMode extends PeriodicOpMode {
+  @SuppressWarnings("unused")
+  private final OpRobot robot;
+
+  @SuppressWarnings("unused")
+  private final DefaultUserControls userControls;
+
+  public DefaultTeleMode(OpRobot robot, DefaultUserControls userControls) {
+    this.robot = robot;
+    this.userControls = userControls;
+  }
+
+  @Override
+  public void periodic() {}
+}

developerRobot/src/main/java/wpilib/robot/OpRobot.java

@@ -0,0 +1,16 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+package wpilib.robot;
+
+import org.wpilib.driverstation.DefaultUserControls;
+import org.wpilib.driverstation.UserControlsInstance;
+import org.wpilib.framework.OpModeRobot;
+
+/** This is a dev program for testing OpModeRobot. */
+@UserControlsInstance(DefaultUserControls.class)
+public class OpRobot extends OpModeRobot {
+  /** Called once at the beginning of the robot program. */
+  public OpRobot() {}
+}