Move CameraServer and WPILib headers into their own folder

The old headers were moved into folders because doing so avoids polluting
the system include directories.

Folder names were also normalized to lowercase.

hal/src/main/native/sim/mockdata/I2CDataInternal.h

@@ -0,0 +1,53 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2017-2018 FIRST. All Rights Reserved.                        */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#pragma once
+
+#include <atomic>
+#include <limits>
+#include <memory>
+
+#include <wpi/mutex.h>
+
+#include "mockdata/I2CData.h"
+#include "mockdata/NotifyListenerVector.h"
+
+namespace hal {
+class I2CData {
+ public:
+  I2CData();
+  ~I2CData();
+
+  int32_t RegisterInitializedCallback(HAL_NotifyCallback callback, void* param,
+                                      HAL_Bool initialNotify);
+  void CancelInitializedCallback(int32_t uid);
+  void InvokeInitializedCallback(HAL_Value value);
+  HAL_Bool GetInitialized();
+  void SetInitialized(HAL_Bool initialized);
+
+  int32_t RegisterReadCallback(HAL_BufferCallback callback, void* param);
+  void CancelReadCallback(int32_t uid);
+
+  int32_t RegisterWriteCallback(HAL_ConstBufferCallback callback, void* param);
+  void CancelWriteCallback(int32_t uid);
+
+  void Write(int32_t deviceAddress, const uint8_t* dataToSend,
+             int32_t sendSize);
+  void Read(int32_t deviceAddress, uint8_t* buffer, int32_t count);
+
+  void ResetData();
+
+ private:
+  wpi::mutex m_registerMutex;
+  wpi::mutex m_dataMutex;
+  std::atomic<HAL_Bool> m_initialized{false};
+  std::shared_ptr<NotifyListenerVector> m_initializedCallbacks = nullptr;
+  std::shared_ptr<BufferListenerVector> m_readCallbacks = nullptr;
+  std::shared_ptr<ConstBufferListenerVector> m_writeCallbacks = nullptr;
+};
+extern I2CData* SimI2CData;
+}  // namespace hal