#10 Add action status.

Add action status in readme.

README.md

@@ -1,16 +1,18 @@
 # HUAWEI-HMS-MLKit-Sample
 
-##Introduction
+![Android CI](https://github.com/HMS-MLKit/HUAWEI-HMS-MLKit-Sample/workflows/Android%20CI/badge.svg)
+
+## Introduction
 
 This project contains examples of using the machine learning APIs provided by Huawei mlkit
 and applications developed based on the machine learning service SDK. The project directory is as follows:
 1. MLKit-Sample: The sample code mainly shows the use of Huawei Machine Learning SDK.
 2. ID-Photo-DIY: It uses still image of people to composite an ID photo with blue background or white background.
 3. Smile-Camera: It uses real-time detection of face to confirm if user is smiling, and then captures a smile photo of the user.
 
-##Precautions
+## Precautions
 
 This project contains multiple independent projects. After downloading the code,
 you can open a certain project individually in Android Studio for compilation,
 or you can add multiple apps to the same project. There's no need to create separate projects for each app.
-You can open setting.gradle to select the project you need to compile.
+You can open setting.gradle to select the project you need to compile.