updated test after migrating to the new android version. This test has different expected values for iOS and Android (update reduces number of differences), created issue to investigate ably/ably-java#1186

Author: ttypic

test_integration/test_driver/test_implementation/realtime_tests.dart

@@ -340,7 +340,6 @@ void testRealtimeEvents(FlutterDriver Function() getDriver) {
             'attaching',
             'attaching',
             'attached',
-            'attached',
             'detaching',
             'detached',
           ];
@@ -349,14 +348,12 @@ void testRealtimeEvents(FlutterDriver Function() getDriver) {
             'attaching',
             'attaching',
             'attached',
-            'attached',
             'detaching',
           ];
           _stateChangeEvents = const [
             'attaching',
             'attaching',
             'attached',
-            'update',
             'detaching',
             'detached',
           ];