Set videoCapturerStopped when PeerConnectionClient stopped

webrtc/examples/androidapp/src/org/appspot/apprtc/PeerConnectionClient.java

Index: webrtc/examples/androidapp/src/org/appspot/apprtc/PeerConnectionClient.java
diff --git a/webrtc/examples/androidapp/src/org/appspot/apprtc/PeerConnectionClient.java b/webrtc/examples/androidapp/src/org/appspot/apprtc/PeerConnectionClient.java
index c152f945a8cba92e04f11342ba183df5873c5468..a26c86d0391181b50a27085e544d20f173967e70 100644
--- a/webrtc/examples/androidapp/src/org/appspot/apprtc/PeerConnectionClient.java
+++ b/webrtc/examples/androidapp/src/org/appspot/apprtc/PeerConnectionClient.java
@@ -540,6 +540,7 @@ public class PeerConnectionClient {
       } catch (InterruptedException e) {
         throw new RuntimeException(e);
       }
+      videoCapturerStopped = true;
       videoCapturer.dispose();
       videoCapturer = null;
     }