Add a switch to redetermine role when ICE restarts.

webrtc/api/android/java/src/org/webrtc/PeerConnection.java

Index: webrtc/api/android/java/src/org/webrtc/PeerConnection.java
diff --git a/webrtc/api/android/java/src/org/webrtc/PeerConnection.java b/webrtc/api/android/java/src/org/webrtc/PeerConnection.java
index 3f7952e4728a30b279543ef10024ae97691361f4..83a778fca705a4c5903b9c27eee3c3eaf67baacf 100644
--- a/webrtc/api/android/java/src/org/webrtc/PeerConnection.java
+++ b/webrtc/api/android/java/src/org/webrtc/PeerConnection.java
@@ -148,6 +148,7 @@ public class PeerConnection {
     public int iceCandidatePoolSize;
     public boolean pruneTurnPorts;
     public boolean presumeWritableWhenFullyRelayed;
+    public boolean redetermineRoleOnIceRestart;
 
     public RTCConfiguration(List<IceServer> iceServers) {
       iceTransportsType = IceTransportsType.ALL;
@@ -165,6 +166,7 @@ public class PeerConnection {
       iceCandidatePoolSize = 0;
       pruneTurnPorts = false;
       presumeWritableWhenFullyRelayed = false;
+      redetermineRoleOnIceRestart = true;
     }
   };