Disable MinimalCoreWin when OpenConsoleUniversalApp is false (#7203)

This fixes the build the rest of the way in VS 16.7. Something about the
way we were using the Store/Container flags caused some of our projects
to end up linking kernel32.lib only (MinimalCoreWin==KernelOnly).
The best way to solve it once and for all is to make sure MinimalCoreWin
is always set.

References 313568d.

(cherry picked from commit 858905f)

src/cppwinrt.build.pre.props

@@ -22,12 +22,20 @@
        at the winmd we build to generate type info.
        In general, cppwinrt projects all want this.
   -->
-  <PropertyGroup Condition="'$(OpenConsoleUniversalApp)'!='false'">
+  <PropertyGroup Condition="'$(OpenConsoleUniversalApp)'=='true'">
     <MinimalCoreWin>true</MinimalCoreWin>
     <AppContainerApplication>true</AppContainerApplication>
     <WindowsStoreApp>true</WindowsStoreApp>
     <ApplicationType>Windows Store</ApplicationType>
   </PropertyGroup>
+  <PropertyGroup Condition="'$(OpenConsoleUniversalApp)'!='true'">
+    <!-- Some of our projects include the cppwinrt build options to
+         just build cppwinrt things, but don't want the store bits
+         in full swing. MinimalCoreWin != false means "don't let me
+         use win32 APIs"
+    -->
+    <MinimalCoreWin>false</MinimalCoreWin>
+  </PropertyGroup>
 
   <!-- This is magic that tells msbuild to link against the Desktop platform
        instead of the App platform. This you definitely want, because we're not