[wpilibc] Transition C++ classes to units::second_t (#3396)

A lot of these are breaking changes. frc::Timer was replaced with the
contents of frc2::Timer. The others were in-place argument changes or
removing deprecated non-unit overloads.

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 <units/time.h>
+
 #include "TestBench.h"
 #include "frc/AnalogInput.h"
 #include "frc/AnalogOutput.h"
@@ -12,7 +14,7 @@
 
 using namespace frc;
 
-static const double kDelayTime = 0.01;
+static constexpr auto kDelayTime = 10_ms;
 
 /**
  * A fixture with an analog input and an analog output wired together