[examples] Enable NT Flush in Field2d examples (#3013)

wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/examples/simpledifferentialdrivesimulation/Robot.java

@@ -33,6 +33,10 @@ public class Robot extends TimedRobot {
 
   @Override
   public void robotInit() {
+    // Flush NetworkTables every loop. This ensures that robot pose and other values
+    // are sent during every iteration.
+    setNetworkTablesFlushEnabled(true);
+
     m_trajectory =
         TrajectoryGenerator.generateTrajectory(
             new Pose2d(2, 2, new Rotation2d()),

wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/examples/statespacedifferentialdrivesimulation/Robot.java

@@ -26,6 +26,10 @@ public class Robot extends TimedRobot {
     // Instantiate our RobotContainer.  This will perform all our button bindings, and put our
     // autonomous chooser on the dashboard.
     m_robotContainer = new RobotContainer();
+
+    // Flush NetworkTables every loop. This ensures that robot pose and other values
+    // are sent during every loop iteration.
+    setNetworkTablesFlushEnabled(true);
   }
 
   @Override