Fix errors from new cpplint.py (#7105)

wpilibcIntegrationTests/src/main/native/cpp/AnalogLoopTest.cpp

@@ -2,6 +2,8 @@
 // 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 <memory>
+
 #include <gtest/gtest.h>
 #include <units/time.h>
 

wpilibcIntegrationTests/src/main/native/cpp/DMATest.cpp

@@ -2,17 +2,18 @@
 // 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 <frc/AnalogInput.h>
-#include <frc/AnalogOutput.h>
-#include <frc/DigitalOutput.h>
-#include <frc/Timer.h>
-#include <frc/motorcontrol/Jaguar.h>
+#include <vector>
 
 #include <gtest/gtest.h>
 
 #include "TestBench.h"
+#include "frc/AnalogInput.h"
+#include "frc/AnalogOutput.h"
 #include "frc/DMA.h"
 #include "frc/DMASample.h"
+#include "frc/DigitalOutput.h"
+#include "frc/Timer.h"
+#include "frc/motorcontrol/Jaguar.h"
 
 using namespace frc;
 

wpilibcIntegrationTests/src/main/native/cpp/FakeEncoderTest.cpp

@@ -4,6 +4,8 @@
 
 #include "frc/Encoder.h"  // NOLINT(build/include_order)
 
+#include <memory>
+
 #include <gtest/gtest.h>
 #include <units/time.h>
 

wpilibcIntegrationTests/src/main/native/cpp/PreferencesTest.cpp

@@ -6,6 +6,7 @@
 
 #include <cstdio>
 #include <fstream>
+#include <string>
 
 #include <gtest/gtest.h>
 #include <networktables/MultiSubscriber.h>