Add example image

Author: amitshekhariitbhu

README.md

@@ -14,6 +14,7 @@
 # [Read this article. It describes everything about building TensorFlow for Android.](https://blog.mindorks.com/android-tensorflow-machine-learning-example-ff0e9b2654cc)
 
 <p align="center">
+  <img src="https://raw.githubusercontent.com/MindorksOpenSource/AndroidTensorFlowMachineLearningExample/master/assets/keyboard_example.png" width="250">
   <img src="https://raw.githubusercontent.com/MindorksOpenSource/AndroidTensorFlowMachineLearningExample/master/assets/pen_example.png" width="250">
   <img src="https://raw.githubusercontent.com/MindorksOpenSource/AndroidTensorFlowMachineLearningExample/master/assets/wallet_example.png" width="250">
 </p>