UWP: Declare expandedResources in manifest

src/duckstation-uwp/Package.appxmanifest

@@ -1,5 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Package xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10" xmlns:mp="http://schemas.microsoft.com/appx/2014/phone/manifest" xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10" IgnorableNamespaces="uap mp">
+<Package xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
+         xmlns:mp="http://schemas.microsoft.com/appx/2014/phone/manifest"
+         xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
+         xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities"
+         IgnorableNamespaces="uap mp">
   <Identity
     Name="57bcfd1f-31c1-4f8e-bf91-958732a81506"
     Publisher="CN=Stenzek"
@@ -49,5 +53,6 @@
     <Capability Name="internetClient" />
     <Capability Name="codeGeneration"/>
     <uap:Capability Name="removableStorage"/>
+    <rescap:Capability Name="expandedResources" />
   </Capabilities>
 </Package>