Include thirdparty libraries with angle brackets (#5578)

simulation/halsim_ds_socket/src/test/native/cpp/DSCommPacketTest.cpp

@@ -2,8 +2,9 @@
 // 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.
 
+#include <gtest/gtest.h>
+
 #include "DSCommPacket.h"
-#include "gtest/gtest.h"
 
 class DSCommPacketTest : public ::testing::Test {
  public:

simulation/halsim_ds_socket/src/test/native/cpp/main.cpp

@@ -2,10 +2,9 @@
 // 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.
 
+#include <gtest/gtest.h>
 #include <hal/HALBase.h>
 
-#include "gtest/gtest.h"
-
 int main(int argc, char** argv) {
   HAL_Initialize(500, 0);
   ::testing::InitGoogleTest(&argc, argv);