[wpilib] Add usage reporting for dashboards as instances (#7294)

Detects dashboards based on network tables client identity.

wpilibc/src/main/native/include/frc/RobotBase.h

@@ -10,6 +10,7 @@
 #include <hal/DriverStation.h>
 #include <hal/HALBase.h>
 #include <hal/Main.h>
+#include <networktables/NetworkTable.h>
 #include <wpi/RuntimeCheck.h>
 #include <wpi/condition_variable.h>
 #include <wpi/mutex.h>
@@ -274,6 +275,8 @@ class RobotBase {
   RobotBase& operator=(RobotBase&&) = default;
 
   static std::thread::id m_threadId;
+  NT_Listener connListenerHandle;
+  bool m_dashboardDetected = false;
 };
 
 }  // namespace frc