Failed to set foreground window in integration tests

[sharwell]

https://dev.azure.com/dnceng/public/_build/results?buildId=1435927

System.AggregateException: One or more errors occurred. ---> System.InvalidOperationException: Failed to set the foreground window.
   at Microsoft.VisualStudio.IntegrationTest.Utilities.IntegrationHelper.SetForegroundWindow(IntPtr window) in /_/src/VisualStudio/IntegrationTest/TestUtilities/IntegrationHelper.cs:line 218
   at Microsoft.VisualStudio.IntegrationTest.Utilities.InProcess.VisualStudio_InProc.<>c.<ActivateMainWindow>b__7_0(CancellationToken cancellationToken) in /_/src/VisualStudio/IntegrationTest/TestUtilities/InProcess/VisualStudio_InProc.cs:line 66
   at Microsoft.VisualStudio.IntegrationTest.Utilities.InProcess.InProcComponent.<>c__DisplayClass6_0.<<InvokeOnUIThread>b__0>d.MoveNext() in /_/src/VisualStudio/IntegrationTest/TestUtilities/InProcess/InProcComponent.cs:line 58
   --- End of inner exception stack trace ---

Server stack trace: 
   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
   at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
   at System.Threading.Tasks.Task.Wait(CancellationToken cancellationToken)
   at Microsoft.VisualStudio.IntegrationTest.Utilities.InProcess.InProcComponent.InvokeOnUIThread(Action`1 action) in /_/src/VisualStudio/IntegrationTest/TestUtilities/InProcess/InProcComponent.cs:line 61
   at Microsoft.VisualStudio.IntegrationTest.Utilities.InProcess.VisualStudio_InProc.ActivateMainWindow() in /_/src/VisualStudio/IntegrationTest/TestUtilities/InProcess/VisualStudio_InProc.cs:line 53
   at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Object[]& outArgs)
   at System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage msg)

Exception rethrown at [0]: 
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at Microsoft.VisualStudio.IntegrationTest.Utilities.InProcess.VisualStudio_InProc.ActivateMainWindow()
   at Microsoft.VisualStudio.IntegrationTest.Utilities.VisualStudioInstance.ActivateMainWindow() in /_/src/VisualStudio/IntegrationTest/TestUtilities/VisualStudioInstance.cs:line 195
   at Roslyn.VisualStudio.IntegrationTests.AbstractIntegrationTest.<InitializeAsync>d__8.MoveNext() in /_/src/VisualStudio/IntegrationTest/IntegrationTests/AbstractIntegrationTest.cs:line 60
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable.ConfiguredTaskAwaiter.GetResult()
   at Roslyn.VisualStudio.IntegrationTests.AbstractEditorTest.<InitializeAsync>d__7.MoveNext() in /_/src/VisualStudio/IntegrationTest/IntegrationTests/AbstractEditorTest.cs:line 46
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable.ConfiguredTaskAwaiter.GetResult()
   at Roslyn.VisualStudio.IntegrationTests.VisualBasic.BasicArgumentProvider.<InitializeAsync>d__3.MoveNext() in /_/src/VisualStudio/IntegrationTest/IntegrationTests/VisualBasic/BasicArgumentProvider.cs:line 27
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
---> (Inner Exception #0) System.InvalidOperationException: Failed to set the foreground window.
   at Microsoft.VisualStudio.IntegrationTest.Utilities.IntegrationHelper.SetForegroundWindow(IntPtr window) in /_/src/VisualStudio/IntegrationTest/TestUtilities/IntegrationHelper.cs:line 218
   at Microsoft.VisualStudio.IntegrationTest.Utilities.InProcess.VisualStudio_InProc.<>c.<ActivateMainWindow>b__7_0(CancellationToken cancellationToken) in /_/src/VisualStudio/IntegrationTest/TestUtilities/InProcess/VisualStudio_InProc.cs:line 66
   at Microsoft.VisualStudio.IntegrationTest.Utilities.InProcess.InProcComponent.<>c__DisplayClass6_0.<<InvokeOnUIThread>b__0>d.MoveNext() in /_/src/VisualStudio/IntegrationTest/TestUtilities/InProcess/InProcComponent.cs:line 58<---

Build	Kind	Start Time
1425665	Rolling	2021-17-10
1426510	Rolling	2021-18-10
1427791	Rolling	2021-18-10
1428206	Rolling	2021-18-10
1428256	Rolling	2021-18-10
1429399	Rolling	2021-19-10
1430055	Rolling	2021-19-10
1430473	Rolling	2021-19-10
1430603	Rolling	2021-19-10
1430928	Rolling	2021-19-10
1430869	Rolling	2021-19-10
1430976	Rolling	2021-19-10
1431121	Rolling	2021-19-10
1431678	Rolling	2021-20-10
1431683	Rolling	2021-20-10
1431784	Rolling	2021-20-10
1432244	Rolling	2021-20-10
1433571	Rolling	2021-21-10
1434178	PR 57029	2021-21-10
1434238	PR 56197	2021-21-10
1434386	PR 57300	2021-21-10
1434538	PR 55469	2021-21-10
1434554	Rolling	2021-21-10
1434564	PR 57305	2021-21-10
1434504	PR 57084	2021-21-10
1434626	PR 57306	2021-21-10
1434813	PR 57254	2021-21-10
1434988	PR 57284	2021-21-10
1435049	PR 57310	2021-21-10
1435154	PR 57307	2021-21-10
1435192	PR 57228	2021-21-10
1435242	PR 57312	2021-21-10
1435296	PR 57303	2021-21-10
1435190	PR 57290	2021-21-10
1435255	PR 57310	2021-21-10
1435385	PR 57316	2021-21-10
1435421	PR 57228	2021-21-10
1435460	Rolling	2021-22-10
1435474	PR 57291	2021-22-10
1435484	PR 56276	2021-22-10
1435603	PR 57317	2021-22-10
1435927	Rolling	2021-22-10
1436064	PR 57029	2021-22-10
1436110	PR 56197	2021-22-10
1436306	PR 54559	2021-22-10
1436419	PR 45105	2021-22-10
1436429	Rolling	2021-22-10
1436565	PR 57266	2021-22-10