Add requirements param to more Command APIs (#2059)

Assorted improvements to the ergonomics of declaring requirements in the new
command framework. C++ requirements list parameters have been defaulted
to an empty list, some missing C++ requirements list parameters have been
added, and both C++ and Java have been given requirements list params in
various InstantCommand wrapper methods (#2049), whose value is
forwarded to the command.

wpilibNewCommands/src/main/native/include/frc2/command/ProfiledPIDCommand.h

@@ -44,7 +44,7 @@ class ProfiledPIDCommand
                      std::function<units::meter_t()> measurementSource,
                      std::function<State()> goalSource,
                      std::function<void(double, State)> useOutput,
-                     std::initializer_list<Subsystem*> requirements);
+                     std::initializer_list<Subsystem*> requirements = {});
 
   /**
    * Creates a new PIDCommand, which controls the given output with a