Removed SDL_bool in favor of plain bool

We require stdbool.h in the build environment, so we might as well use the plain bool type.

If your environment doesn't have stdbool.h, this simple replacement will suffice:
typedef signed char bool;

src/hidapi/SDL_hidapi.c

@@ -1685,7 +1685,7 @@ int SDL_hid_get_report_descriptor(SDL_hid_device *device, unsigned char *buf, si
     return device->backend->hid_get_report_descriptor(device->device, buf, buf_size);
 }
 
-void SDL_hid_ble_scan(SDL_bool active)
+void SDL_hid_ble_scan(bool active)
 {
 #if !defined(SDL_HIDAPI_DISABLED) && (defined(SDL_PLATFORM_IOS) || defined(SDL_PLATFORM_TVOS))
     extern void hid_ble_scan(int bStart);

src/hidapi/android/hid.cpp

@@ -1030,7 +1030,7 @@ extern "C"
 {
 
 // !!! FIXME: make this non-blocking!
-static void SDLCALL RequestAndroidPermissionBlockingCallback(void *userdata, const char *permission, SDL_bool granted)
+static void SDLCALL RequestAndroidPermissionBlockingCallback(void *userdata, const char *permission, bool granted)
 {
     SDL_SetAtomicInt((SDL_AtomicInt *) userdata, granted ? 1 : -1);
 }