exportVendorInfoToJson function
Get BiosInfo (bios key in Map), BoardInfo (mother_board key in Map)
and SystemInfo (system key in Map) into an unmodifiable Map.
Implementation
Future<Map<String, dynamic>> exportVendorInfoToJson() async =>
Map.unmodifiable(<String, dynamic>{
"bios": await getBiosInfo().then((value) => value.toJson()),
"mother_board": await getBoardInfo().then((value) => value.toJson()),
"system": await getSystemInfo().then((value) => value.toJson()),
});