Update dependencies from...

Update dependencies from https://dev.azure.com/dnceng/internal/_git/dotnet-wpf-int build 20190807.25 (#1573)

- Microsoft.DotNet.Wpf.DncEng - 4.8.0-preview9.19407.25

eng/Version.Details.xml

@@ -75,9 +75,9 @@
       <Uri>https://github.com/dotnet/corefx</Uri>
       <Sha>1bb52e6a3db7f3673a3825f3677b9f27b9af99aa</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Wpf.DncEng" Version="4.8.0-preview9.19406.11">
+    <Dependency Name="Microsoft.DotNet.Wpf.DncEng" Version="4.8.0-preview9.19407.25">
       <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-wpf-int</Uri>
-      <Sha>a0f406bc6471b318d3be8b5b7ea1b7503fea33be</Sha>
+      <Sha>df96a8d96450c2193b3c4eedae02f186ad9c4b8e</Sha>
     </Dependency>
     <Dependency Name="System.IO.Packaging" Version="4.6.0-preview8.19405.3" CoherentParentDependency="Microsoft.NETCore.App">
       <Uri>https://github.com/dotnet/corefx</Uri>

eng/Versions.props

@@ -112,6 +112,6 @@
       It is worth reiterating that this package *should not* be consumed to build the product.
   -->
   <PropertyGroup>
-    <MicrosoftDotNetWpfDncEngVersion>4.8.0-preview9.19406.11</MicrosoftDotNetWpfDncEngVersion>
+    <MicrosoftDotNetWpfDncEngVersion>4.8.0-preview9.19407.25</MicrosoftDotNetWpfDncEngVersion>
   </PropertyGroup>
 </Project>