Created app installer template (#8213)

Author: yaira2

src/Files.Package/Files.Package.wapproj

@@ -476,6 +476,7 @@
     <Content Include="Assets\AppTilesDev\Wide310x150Logo.scale-150.png" />
     <Content Include="Assets\AppTilesDev\Wide310x150Logo.scale-200.png" />
     <Content Include="Assets\AppTilesDev\Wide310x150Logo.scale-400.png" />
+    <Content Include="Package.appinstaller" />
   </ItemGroup>
   <ItemGroup>
     <None Include="nupkgs\microsoft.management.infrastructure.runtime.win.2.0.1.nupkg" />

src/Files.Package/Package.appinstaller

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<AppInstaller Uri="{AppInstallerUri}"
+              Version="{Version}"
+              xmlns="http://schemas.microsoft.com/appx/appinstaller/2018">
+
+  <MainBundle Name="{Name}"
+              Version="{Version}"
+              Publisher="{Publisher}"
+              Uri="{MainPackageUri}"/>
+
+  <UpdateSettings>
+	<OnLaunch HoursBetweenUpdateChecks="0"/>
+	<AutomaticBackgroundTask/>
+  </UpdateSettings>
+
+</AppInstaller>