Subscriptions auto reconnect not working in 3.x

[mxalbert1996]

Describe the bug
AppSync SDK is not trying to reconnect after connection failure.

com.apollographql.apollo.exception.ApolloException: Subscription failed.
    at com.amazonaws.mobileconnectors.appsync.WebSocketConnectionManager.notifyFailure(WebSocketConnectionManager.java:212)
    at com.amazonaws.mobileconnectors.appsync.WebSocketConnectionManager.access$400(WebSocketConnectionManager.java:39)
    at com.amazonaws.mobileconnectors.appsync.WebSocketConnectionManager$1.onFailure(WebSocketConnectionManager.java:141)
    at okhttp3.internal.ws.RealWebSocket.failWebSocket(RealWebSocket.kt:592)
    at okhttp3.internal.ws.RealWebSocket$connect$1.onResponse(RealWebSocket.kt:197)
    at okhttp3.internal.connection.RealCall$AsyncCall.run(RealCall.kt:519)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
    at java.lang.Thread.run(Thread.java:764)
 Caused by: javax.net.ssl.SSLException: Read error: ssl=0x7b1b2808: I/O error during system call, Software caused connection abort
    at com.android.org.conscrypt.NativeCrypto.SSL_read(Native Method)
    at com.android.org.conscrypt.NativeSsl.read(NativeSsl.java:399)
    at com.android.org.conscrypt.ConscryptFileDescriptorSocket$SSLInputStream.read(ConscryptFileDescriptorSocket.java:546)
    at okio.InputStreamSource.read(JvmOkio.kt:90)
    at okio.AsyncTimeout$source$1.read(AsyncTimeout.kt:129)
    at okio.RealBufferedSource.request(RealBufferedSource.kt:207)
    at okio.RealBufferedSource.require(RealBufferedSource.kt:201)
    at okio.RealBufferedSource.readByte(RealBufferedSource.kt:210)
    at okhttp3.internal.ws.WebSocketReader.readHeader(WebSocketReader.kt:119)
    at okhttp3.internal.ws.WebSocketReader.processNextFrame(WebSocketReader.kt:102)
    at okhttp3.internal.ws.RealWebSocket.loopReader(RealWebSocket.kt:293)
    at okhttp3.internal.ws.RealWebSocket$connect$1.onResponse(RealWebSocket.kt:195)
    at okhttp3.internal.connection.RealCall$AsyncCall.run(RealCall.kt:519) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) 
    at java.lang.Thread.run(Thread.java:764) 

To Reproduce
For example you can disable Wi-Fi while a subscription is active.

Expected behavior
AppSync SDK should try to reconnect if subscriptionsAutoReconnect is enabled (which is by default).

Environment(please complete the following information):

• AppSync SDK Version: 3.1.1

Device Information (please complete the following information):

• Device: All devices
• Android Version: Pie 9.0

Additional context
The only place where subscriptionsAutoReconnect is used in the library seems to be the legacy MQTT-related code.
In the code where WebSockets are created, there is no occurences of subscriptionsAutoReconnect and no reconnecting logic in the onFailure callback of the WebSocketListener, which is needed because OkHttp will not automatically try to reconnect unless you mannually do so.

[richardmcclellan]

The 2.x releases use MQTT as a subscription transport, instead of WebSockets, as in 3.x. If you are blocked by this error, please try using 2.x.