Start the accept thread when the socket gets disconnected.

Change-Id: I937c19c657a1077df8c2c19b5edc3fec218e11a4

samples/BluetoothChat/src/com/example/android/BluetoothChat/BluetoothChatService.java

@@ -402,6 +402,8 @@ public class BluetoothChatService {
                 } catch (IOException e) {
                     Log.e(TAG, "disconnected", e);
                     connectionLost();
+                    // Start the service over to restart listening mode
+                    BluetoothChatService.this.start();
                     break;
                 }
             }