Closing socket on main thread can throw exception on Android 11

[novak-dev]

I am seeing NetworkOnMainThreadException when handling close event

10-28 17:12:53.003 20108 20108 E AndroidRuntime: android.os.NetworkOnMainThreadException
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1605)
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at com.android.org.conscrypt.Platform.blockGuardOnNetwork(Platform.java:426)
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at com.android.org.conscrypt.ConscryptEngineSocket$SSLOutputStream.writeInternal(ConscryptEngineSocket.java:657)
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at com.android.org.conscrypt.ConscryptEngineSocket$SSLOutputStream.access$200(ConscryptEngineSocket.java:616)
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at com.android.org.conscrypt.ConscryptEngineSocket.drainOutgoingQueue(ConscryptEngineSocket.java:585)
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at com.android.org.conscrypt.ConscryptEngineSocket.close(ConscryptEngineSocket.java:480)
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at com.android.org.conscrypt.ConscryptEngineSocket$SSLInputStream.close(ConscryptEngineSocket.java:748)
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at java.io.BufferedInputStream.close(BufferedInputStream.java:485)
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at io.crossbar.autobahn.websocket.WebSocketReader.quit(WebSocketReader.java:130)
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at io.crossbar.autobahn.websocket.WebSocketConnection.closeReaderThread(WebSocketConnection.java:259)
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at io.crossbar.autobahn.websocket.WebSocketConnection.failConnection(WebSocketConnection.java:300)
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at io.crossbar.autobahn.websocket.WebSocketConnection.access$2700(WebSocketConnection.java:60)
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at io.crossbar.autobahn.websocket.WebSocketConnection$2.onMessage(WebSocketConnection.java:712)
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at io.crossbar.autobahn.websocket.utils.AndroidThreadMessenger$1.handleMessage(AndroidThreadMessenger.java:38)
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:106)
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at android.os.Looper.loop(Looper.java:246)
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:8653)
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
10-28 17:12:53.003 20108 20108 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)

I found this commit in AOSP Android 11 branch that I believe is the root cause of this:
https://cs.android.com/android/_/android/platform/external/conscrypt/+/9a16085cc2f182bfca9dd6a0d02c82c934887a82

[novak-dev]

Is there a reason why "AndroidThreadMessenger" is attached to main looper? Can it be moved to a dedicated thread? I think thats one way this can be fixed.