[wasm][http] response.Content.ReadAsStreamAsync().CanSeek != false

[pavelsavara]

Unit test
System.Net.Http.Functional.Tests.SocketsHttpHandler_HttpClientHandlerTest.ReadAsStreamAsync_EmptyResponseBody_HandlerProducesWellBehavedResponseStream and System.Net.Http.Functional.Tests.SocketsHttpHandler_HttpClientHandlerTest.ReadAsStreamAsync_HandlerProducesWellBehavedResponseStream in browser

Assert.False() Failure
Expected: False
Actual:   True
   at System.Net.Http.Functional.Tests.HttpClientHandlerTest.<ReadAsStreamAsync_EmptyResponseBody_HandlerProducesWellBehavedResponseStream>b__28_0(Uri uri) in C:\Dev\runtime\src\libraries\Common\tests\System\Net\Http\HttpClientHandlerTest.cs:line 1112
   at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks) in C:\Dev\runtime\src\libraries\Common\tests\System\Threading\Tasks\TaskTimeoutExtensions.cs:line 63
   at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks) in C:\Dev\runtime\src\libraries\Common\tests\System\Threading\Tasks\TaskTimeoutExtensions.cs:line 82
   at System.Net.Test.Common.LoopbackServerFactory.<>c__DisplayClass5_0.<<CreateClientAndServerAsync>b__0>d.MoveNext() in C:\Dev\runtime\src\libraries\Common\tests\System\Net\Http\GenericLoopbackServer.cs:line 38

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Issue Details

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Unit test
System.Net.Http.Functional.Tests.SocketsHttpHandler_HttpClientHandlerTest.ReadAsStreamAsync_EmptyResponseBody_HandlerProducesWellBehavedResponseStream and System.Net.Http.Functional.Tests.SocketsHttpHandler_HttpClientHandlerTest.ReadAsStreamAsync_HandlerProducesWellBehavedResponseStream in browser

Assert.False() Failure
Expected: False
Actual:   True
   at System.Net.Http.Functional.Tests.HttpClientHandlerTest.<ReadAsStreamAsync_EmptyResponseBody_HandlerProducesWellBehavedResponseStream>b__28_0(Uri uri) in C:\Dev\runtime\src\libraries\Common\tests\System\Net\Http\HttpClientHandlerTest.cs:line 1112
   at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks) in C:\Dev\runtime\src\libraries\Common\tests\System\Threading\Tasks\TaskTimeoutExtensions.cs:line 63
   at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks) in C:\Dev\runtime\src\libraries\Common\tests\System\Threading\Tasks\TaskTimeoutExtensions.cs:line 82
   at System.Net.Test.Common.LoopbackServerFactory.<>c__DisplayClass5_0.<<CreateClientAndServerAsync>b__0>d.MoveNext() in C:\Dev\runtime\src\libraries\Common\tests\System\Net\Http\GenericLoopbackServer.cs:line 38

Author:	pavelsavara
Assignees:	-
Labels:	arch-wasm, area-System.Net.Http
Milestone:	-