Add missing System.Memory references (#9140)

* Add missing System.Memory references

* Update WindowsFormsIntegration.csproj

Author: ViktorHofer

src/Microsoft.DotNet.Wpf/src/UIAutomation/UIAutomationClient/UIAutomationClient.csproj

@@ -113,6 +113,7 @@
     <NetCoreReference Include="System.Diagnostics.Process" />
     <NetCoreReference Include="System.Diagnostics.StackTrace" />
     <NetCoreReference Include="System.Diagnostics.Tools" />
+    <NetCoreReference Include="System.Memory" />
     <NetCoreReference Include="System.Resources.ResourceManager" />
     <NetCoreReference Include="System.Runtime" />
     <NetCoreReference Include="System.Resources.ResourceManager" />

src/Microsoft.DotNet.Wpf/src/WindowsFormsIntegration/WindowsFormsIntegration.csproj

@@ -65,6 +65,7 @@
     <NetCoreReference Include="System.Diagnostics.TraceSource" />
     <NetCoreReference Include="System.Drawing" />
     <NetCoreReference Include="System.Drawing.Primitives" />
+    <NetCoreReference Include="System.Memory" />
     <NetCoreReference Include="System.Resources.ResourceManager" />
     <NetCoreReference Include="System.Runtime" />
     <NetCoreReference Include="System.Runtime.Extensions" />