[sim] Move Sim classes from HAL to wpilibc/j (#2549)

Also move some things in HAL for consistency.

WAS:
C++:
- C APIs: #include "mockdata/AccelerometerData.h"
- User side class: #include "simulation/AccelerometerSim.h"
Java:
- JNI APIs: hal.sim.mockdata.AccelerometerData (and a few classes in hal.sim)
- User side classes: hal.sim.AccelerometerSim

IS:
C++:
- C APIs: #include "hal/simulation/AccelerometerData.h"
- C++ class: #include "frc/simulation/AccelerometerSim.h"
Java:
- JNI APIs: hal.simulation.AccelerometerData
- User side class: wpilibj.simulation.AccelerometerSim

hal/src/main/native/sim/jni/SimulatorJNI.cpp

@@ -14,10 +14,10 @@
 #include "ConstBufferCallbackStore.h"
 #include "SimDeviceDataJNI.h"
 #include "SpiReadAutoReceiveBufferCallbackStore.h"
-#include "edu_wpi_first_hal_sim_mockdata_SimulatorJNI.h"
+#include "edu_wpi_first_hal_simulation_SimulatorJNI.h"
 #include "hal/HAL.h"
 #include "hal/handles/HandlesInternal.h"
-#include "mockdata/MockHooks.h"
+#include "hal/simulation/MockHooks.h"
 
 using namespace wpi::java;
 
@@ -40,14 +40,16 @@ jint SimOnLoad(JavaVM* vm, void* reserved) {
   if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK)
     return JNI_ERR;
 
-  notifyCallbackCls = JClass(env, "edu/wpi/first/hal/sim/NotifyCallback");
+  notifyCallbackCls =
+      JClass(env, "edu/wpi/first/hal/simulation/NotifyCallback");
   if (!notifyCallbackCls) return JNI_ERR;
 
   notifyCallbackCallback = env->GetMethodID(notifyCallbackCls, "callbackNative",
                                             "(Ljava/lang/String;IJD)V");
   if (!notifyCallbackCallback) return JNI_ERR;
 
-  bufferCallbackCls = JClass(env, "edu/wpi/first/hal/sim/BufferCallback");
+  bufferCallbackCls =
+      JClass(env, "edu/wpi/first/hal/simulation/BufferCallback");
   if (!bufferCallbackCls) return JNI_ERR;
 
   bufferCallbackCallback = env->GetMethodID(bufferCallbackCls, "callback",
@@ -55,15 +57,15 @@ jint SimOnLoad(JavaVM* vm, void* reserved) {
   if (!bufferCallbackCallback) return JNI_ERR;
 
   constBufferCallbackCls =
-      JClass(env, "edu/wpi/first/hal/sim/ConstBufferCallback");
+      JClass(env, "edu/wpi/first/hal/simulation/ConstBufferCallback");
   if (!constBufferCallbackCls) return JNI_ERR;
 
   constBufferCallbackCallback = env->GetMethodID(
       constBufferCallbackCls, "callback", "(Ljava/lang/String;[BI)V");
   if (!constBufferCallbackCallback) return JNI_ERR;
 
-  spiReadAutoReceiveBufferCallbackCls =
-      JClass(env, "edu/wpi/first/hal/sim/SpiReadAutoReceiveBufferCallback");
+  spiReadAutoReceiveBufferCallbackCls = JClass(
+      env, "edu/wpi/first/hal/simulation/SpiReadAutoReceiveBufferCallback");
   if (!spiReadAutoReceiveBufferCallbackCls) return JNI_ERR;
 
   spiReadAutoReceiveBufferCallbackCallback =
@@ -109,108 +111,108 @@ jmethodID GetSpiReadAutoReceiveBufferCallback() {
 
 extern "C" {
 /*
- * Class:     edu_wpi_first_hal_sim_mockdata_SimulatorJNI
+ * Class:     edu_wpi_first_hal_simulation_SimulatorJNI
  * Method:    setRuntimeType
  * Signature: (I)V
  */
 JNIEXPORT void JNICALL
-Java_edu_wpi_first_hal_sim_mockdata_SimulatorJNI_setRuntimeType
+Java_edu_wpi_first_hal_simulation_SimulatorJNI_setRuntimeType
   (JNIEnv*, jclass, jint type)
 {
   HALSIM_SetRuntimeType(static_cast<HAL_RuntimeType>(type));
 }
 
 /*
- * Class:     edu_wpi_first_hal_sim_mockdata_SimulatorJNI
+ * Class:     edu_wpi_first_hal_simulation_SimulatorJNI
  * Method:    waitForProgramStart
  * Signature: ()V
  */
 JNIEXPORT void JNICALL
-Java_edu_wpi_first_hal_sim_mockdata_SimulatorJNI_waitForProgramStart
+Java_edu_wpi_first_hal_simulation_SimulatorJNI_waitForProgramStart
   (JNIEnv*, jclass)
 {
   HALSIM_WaitForProgramStart();
 }
 
 /*
- * Class:     edu_wpi_first_hal_sim_mockdata_SimulatorJNI
+ * Class:     edu_wpi_first_hal_simulation_SimulatorJNI
  * Method:    setProgramStarted
  * Signature: ()V
  */
 JNIEXPORT void JNICALL
-Java_edu_wpi_first_hal_sim_mockdata_SimulatorJNI_setProgramStarted
+Java_edu_wpi_first_hal_simulation_SimulatorJNI_setProgramStarted
   (JNIEnv*, jclass)
 {
   HALSIM_SetProgramStarted();
 }
 
 /*
- * Class:     edu_wpi_first_hal_sim_mockdata_SimulatorJNI
+ * Class:     edu_wpi_first_hal_simulation_SimulatorJNI
  * Method:    restartTiming
  * Signature: ()V
  */
 JNIEXPORT void JNICALL
-Java_edu_wpi_first_hal_sim_mockdata_SimulatorJNI_restartTiming
+Java_edu_wpi_first_hal_simulation_SimulatorJNI_restartTiming
   (JNIEnv*, jclass)
 {
   HALSIM_RestartTiming();
 }
 
 /*
- * Class:     edu_wpi_first_hal_sim_mockdata_SimulatorJNI
+ * Class:     edu_wpi_first_hal_simulation_SimulatorJNI
  * Method:    pauseTiming
  * Signature: ()V
  */
 JNIEXPORT void JNICALL
-Java_edu_wpi_first_hal_sim_mockdata_SimulatorJNI_pauseTiming
+Java_edu_wpi_first_hal_simulation_SimulatorJNI_pauseTiming
   (JNIEnv*, jclass)
 {
   HALSIM_PauseTiming();
 }
 
 /*
- * Class:     edu_wpi_first_hal_sim_mockdata_SimulatorJNI
+ * Class:     edu_wpi_first_hal_simulation_SimulatorJNI
  * Method:    resumeTiming
  * Signature: ()V
  */
 JNIEXPORT void JNICALL
-Java_edu_wpi_first_hal_sim_mockdata_SimulatorJNI_resumeTiming
+Java_edu_wpi_first_hal_simulation_SimulatorJNI_resumeTiming
   (JNIEnv*, jclass)
 {
   HALSIM_ResumeTiming();
 }
 
 /*
- * Class:     edu_wpi_first_hal_sim_mockdata_SimulatorJNI
+ * Class:     edu_wpi_first_hal_simulation_SimulatorJNI
  * Method:    isTimingPaused
  * Signature: ()Z
  */
 JNIEXPORT jboolean JNICALL
-Java_edu_wpi_first_hal_sim_mockdata_SimulatorJNI_isTimingPaused
+Java_edu_wpi_first_hal_simulation_SimulatorJNI_isTimingPaused
   (JNIEnv*, jclass)
 {
   return HALSIM_IsTimingPaused();
 }
 
 /*
- * Class:     edu_wpi_first_hal_sim_mockdata_SimulatorJNI
+ * Class:     edu_wpi_first_hal_simulation_SimulatorJNI
  * Method:    stepTiming
  * Signature: (J)V
  */
 JNIEXPORT void JNICALL
-Java_edu_wpi_first_hal_sim_mockdata_SimulatorJNI_stepTiming
+Java_edu_wpi_first_hal_simulation_SimulatorJNI_stepTiming
   (JNIEnv*, jclass, jlong delta)
 {
   HALSIM_StepTiming(delta);
 }
 
 /*
- * Class:     edu_wpi_first_hal_sim_mockdata_SimulatorJNI
+ * Class:     edu_wpi_first_hal_simulation_SimulatorJNI
  * Method:    resetHandles
  * Signature: ()V
  */
 JNIEXPORT void JNICALL
-Java_edu_wpi_first_hal_sim_mockdata_SimulatorJNI_resetHandles
+Java_edu_wpi_first_hal_simulation_SimulatorJNI_resetHandles
   (JNIEnv*, jclass)
 {
   hal::HandleBase::ResetGlobalHandles();