joystick: Add HIDAPI driver for NVIDIA SHIELD 2017 controller

Basic input already works using the OS HID driver, but this enables
force feedback and battery state reporting.

include/SDL_gamecontroller.h

@@ -69,7 +69,8 @@ typedef enum
     SDL_CONTROLLER_TYPE_VIRTUAL,
     SDL_CONTROLLER_TYPE_PS5,
     SDL_CONTROLLER_TYPE_AMAZON_LUNA,
-    SDL_CONTROLLER_TYPE_GOOGLE_STADIA
+    SDL_CONTROLLER_TYPE_GOOGLE_STADIA,
+    SDL_CONTROLLER_TYPE_NVIDIA_SHIELD
 } SDL_GameControllerType;
 
 typedef enum

include/SDL_hints.h

@@ -674,6 +674,17 @@ extern "C" {
   */
 #define SDL_HINT_JOYSTICK_HIDAPI_LUNA "SDL_JOYSTICK_HIDAPI_LUNA"
 
+/**
+  *  \brief  A variable controlling whether the HIDAPI driver for NVIDIA SHIELD controllers should be used.
+  *
+  *  This variable can be set to the following values:
+  *    "0"       - HIDAPI driver is not used
+  *    "1"       - HIDAPI driver is used
+  *
+  *  The default is the value of SDL_HINT_JOYSTICK_HIDAPI
+  */
+#define SDL_HINT_JOYSTICK_HIDAPI_SHIELD "SDL_JOYSTICK_HIDAPI_SHIELD"
+
 /**
  *  \brief  A variable controlling whether the HIDAPI driver for PS4 controllers should be used.
  *