Add VAD + Non-streaming ASR model for Android (#336)

android/README.md

@@ -3,3 +3,13 @@
 Please refer to
 https://k2-fsa.github.io/sherpa/onnx/android/index.html
 for usage.
+
+- [SherpaOnnx](./SherpaOnnx) It uses a streaming ASR model.
+
+- [SherpaOnnx2Pass](./SherpaOnnx2Pass) It uses a streaming ASR model
+  for the first pass and use a non-streaming ASR model for the second pass.
+
+- [SherpaOnnxVad](./SherpaOnnxVad) It demonstrates how to use a VAD
+
+- [SherpaOnnxVadAsr](./SherpaOnnxVadAsr) It uses a VAD with a non-streaming
+  ASR model.