Face recognition demo

async test.demo_face_recognize.test_ObserveFaceRecognise()

Face recognition demo

Monitor face recognition events, and the robot reports the recognized face information (array)

If it is a registered face, return face details: id, name, gender, age

If it is a stranger, return name: “stranger”

When the face is successfully recognized, stop monitoring and broadcast “Hello, xxx” (xxx is the name in the face information)