Introduction can fail if pressing ACCEPT two times
When a phone is to slow to update the invitation message, and the user impatiently presses ACCEPT again, the introduction gets aborted:
01-04 11:24:17.048 I/IntroduceeEngine: Sending accept response in state AWAIT_RESPONSES
01-04 11:24:17.048 I/IntroduceeEngine: Moving on to state AWAIT_REMOTE_RESPONSE
01-04 11:24:17.118 I/MessageQueueManagerImpl: Sending message with position 7
01-04 11:24:17.438 I/ConversationActivity: Marking read took 19 ms
01-04 11:24:17.878 I/DuplexOutgoingSession: Generated offer: true
01-04 11:24:17.878 I/DuplexOutgoingSession: Sent offer
01-04 11:24:18.348 I/ConversationActivity: Loading messages took 462 ms
01-04 11:24:18.428 I/DuplexOutgoingSession: Generated request: true
01-04 11:24:18.428 I/DuplexOutgoingSession: Sent request
01-04 11:24:18.438 W/ConnectionManagerImpl: java.net.SocketTimeoutException
java.net.SocketTimeoutException
at java.net.PlainSocketImpl.read(PlainSocketImpl.java:491)
at java.net.PlainSocketImpl.access$000(PlainSocketImpl.java:46)
at java.net.PlainSocketImpl$PlainSocketInputStream.read(PlainSocketImpl.java:240)
at org.briarproject.bramble.crypto.StreamDecrypterImpl.readFrame(StreamDecrypterImpl.java:70)
at org.briarproject.bramble.transport.StreamReaderImpl.readFrame(StreamReaderImpl.java:63)
at org.briarproject.bramble.transport.StreamReaderImpl.read(StreamReaderImpl.java:51)
at org.briarproject.bramble.sync.RecordReaderImpl.readRecord(RecordReaderImpl.java:59)
at org.briarproject.bramble.sync.RecordReaderImpl.eof(RecordReaderImpl.java:100)
at org.briarproject.bramble.sync.IncomingSession.run(IncomingSession.java:65)
at org.briarproject.bramble.plugin.ConnectionManagerImpl$ManageIncomingDuplexConnection.run(ConnectionManagerImpl.java:278)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:856)
01-04 11:24:18.438 I/ConnectionRegistryImpl: Incoming connection unregistered: org.briarproject.bramble.tor
01-04 11:24:18.438 I/ConnectionRegistryImpl: Contact disconnected
01-04 11:24:19.298 I/DuplexOutgoingSession: Generated offer: false
01-04 11:24:19.438 I/DuplexOutgoingSession: Generated request: false
01-04 11:24:19.618 W/IntroduceeEngine: Error: Invalid action in state AWAIT_REMOTE_RESPONSE
01-04 11:24:19.618 W/IntroduceeEngine: Aborting protocol session in state AWAIT_REMOTE_RESPONSE