updated the readme.md for the new multi-viewer feature

Author: Yuqi Huang

README.md

@@ -89,7 +89,28 @@ Once login is successful, you will entering the following channel information to
   * Start the web browser using the [Javascript SDK](https://github.com/awslabs/amazon-kinesis-video-streams-webrtc-sdk-js) and start it as `viewer`.
   * Verify media showing up from the Android device to the browser.
 
-## 6. ICE Candidate Trickling
+
+## 6. WebRTC Ingestion support
+
+The sample application demonstrates how to connect to the KVS WebRTC storage session as a master or viewer participant.
+
+For more information about WebRTC ingestion, see https://docs.aws.amazon.com/kinesisvideostreams-webrtc-dg/latest/devguide/webrtc-ingestion.html.
+
+  ### 6.1 Setting up signaling channel and stream
+
+Follow the instructions below to:
+
+  ### 6.2 Prerequisites
+
+* Ensure H.264 and OPUS codec support is available on the device
+
+Usage:
+  1. Master with Ingest Media: Check the "Ingest Media" option and ensure both "Send Audio" and "Send Video" are selected. The master will stream audio and video to both connected viewers and Kinesis Video Streams.
+
+  2. Viewer with Ingest Media: Check the "Ingest Media" option but only select "Send Audio" (video must be deselected). Multiple viewers(at most three) can connect to the same channel and each will ingest audio-only streams to Kinesis Video Streams.
+  
+
+## 7. ICE Candidate Trickling
 
 Candidate trickling is a technique through which a caller may incrementally provide candidates to the callee after the initial offer has been dispatched; the semantics of "Trickle ICE" are defined in [RFC8838].
 
@@ -100,7 +121,7 @@ However, in the case that it needs to be disabled, locate the RTCConfiguration p
 PeerConnection.RTCConfiguration rtcConfig = new PeerConnection.RTCConfiguration();
 rtcConfig.continualGatheringPolicy = PeerConnection.ContinualGatheringPolicy.GATHER_CONTINUALLY;
 ```
-## 7. Testing
+## 8. Testing
 This SDK has been tested with Java 11, 17 to build the Gradle dependencies and Java 8, 11, and, 17 in the compile options in build.gradle
 
 ```agsl