Merge pull request pytorch#604 from jeffxtang/mobile_demo_links

added links to new D2Go Android demo app

Author: brianjo

_mobile/android.md

@@ -203,6 +203,10 @@ After that, the code processes the output, finding classes with the highest scor
 
 ## More PyTorch Android Demo Apps
 
+### D2go
+
+[D2Go](https://github.com/pytorch/android-demo-app/tree/master/D2Go) demonstrates a Python script that creates the much lighter and much faster Facebook [D2Go](https://github.com/facebookresearch/d2go) model that is powered by PyTorch 1.8, torchvision 0.9, and Detectron2 with built-in SOTA networks for mobile, and an Android app that uses it to detect objects from pictures in your photos, taken with camera, or with live camera. This demo app also shows how to use the native pre-built torchvision-ops library.
+
 ### Image Segmentation
 
 [Image Segmentation](https://github.com/pytorch/android-demo-app/tree/master/ImageSegmentation) demonstrates a Python script that converts the PyTorch [DeepLabV3](https://pytorch.org/hub/pytorch_vision_deeplabv3_resnet101/) model and an Android app that uses the model to segment images.

_mobile/home.md

@@ -52,14 +52,15 @@ A typical workflow from training to mobile deployment with the optional model op
 * [PyTorch Mobile Recipes in Tutorials](https://pytorch.org/tutorials/recipes/ptmobile_recipes_summary.html)
 * [Image Segmentation DeepLabV3 on iOS](https://pytorch.org/tutorials/beginner/deeplabv3_on_ios.html)
 * [Image Segmentation DeepLabV3 on Android](https://pytorch.org/tutorials/beginner/deeplabv3_on_android.html)
+* [D2Go on Android](https://github.com/pytorch/android-demo-app/tree/master/D2Go)
 
 ## Demo apps
 
-Our new demo apps also include examples of image segmentation, object detection, neural machine translation, 
+Our new demo apps also include examples of image segmentation, object detection, neural machine translation,
 question answering, and vision transformers. They are available on both iOS and Android:
 
-* [iOS demo app](https://github.com/pytorch/ios-demo-app)
-* [Android demo app](https://github.com/pytorch/android-demo-app)
+* [iOS demo apps](https://github.com/pytorch/ios-demo-app)
+* [Android demo apps](https://github.com/pytorch/android-demo-app)