[hal] Consistently use .hpp for C++ header content

Some headers were renamed, but others were split.

hal/src/main/native/sim/mockdata/AnalogInDataInternal.hpp

@@ -0,0 +1,29 @@
+// 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.
+
+#pragma once
+
+#include <stdint.h>
+
+#include "wpi/hal/simulation/SimDataValue.hpp"
+
+namespace wpi::hal {
+class AnalogInData {
+  HAL_SIMDATAVALUE_DEFINE_NAME(Initialized)
+  HAL_SIMDATAVALUE_DEFINE_NAME(AverageBits)
+  HAL_SIMDATAVALUE_DEFINE_NAME(OversampleBits)
+  HAL_SIMDATAVALUE_DEFINE_NAME(Voltage)
+
+ public:
+  SimDataValue<HAL_Bool, HAL_MakeBoolean, GetInitializedName> initialized{
+      false};
+  std::atomic<HAL_SimDeviceHandle> simDevice;
+  SimDataValue<int32_t, HAL_MakeInt, GetAverageBitsName> averageBits{7};
+  SimDataValue<int32_t, HAL_MakeInt, GetOversampleBitsName> oversampleBits{0};
+  SimDataValue<double, HAL_MakeDouble, GetVoltageName> voltage{0.0};
+
+  virtual void ResetData();
+};
+extern AnalogInData* SimAnalogInData;
+}  // namespace wpi::hal