update WindowsSDK versions

Author: Yajur-Grover

packages/default-storage/windows/ReactNativeAsyncStorage/ReactNativeAsyncStorage.vcxproj

@@ -30,16 +30,18 @@
         <AppContainerApplication>true</AppContainerApplication>
         <ApplicationType>Windows Store</ApplicationType>
         <ApplicationTypeRevision>10.0</ApplicationTypeRevision>
-        <WindowsTargetPlatformVersion Condition=" '$(WindowsTargetPlatformVersion)' == '' ">10.0</WindowsTargetPlatformVersion>
-        <WindowsTargetPlatformMinVersion Condition=" '$(WindowsTargetPlatformMinVersion)' == '' ">10.0.17763.0</WindowsTargetPlatformMinVersion>
       </PropertyGroup>
     </Otherwise>
   </Choose>
   <PropertyGroup Label="ReactNativeWindowsProps">
     <ReactNativeWindowsDir Condition="'$(ReactNativeWindowsDir)' == ''">$([MSBuild]::GetDirectoryNameOfFileAbove($(SolutionDir), 'node_modules\react-native-windows\package.json'))\node_modules\react-native-windows\</ReactNativeWindowsDir>
     <RunAutolinkCheck>false</RunAutolinkCheck>
   </PropertyGroup>
-  <Import Project="$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.WindowsSdk.Default.props" />
+  <Import Project="$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.WindowsSdk.Default.props" Condition="Exists('$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.WindowsSdk.Default.props')"/>
+  <PropertyGroup Label="Fallback Windows SDK Versions">
+    <WindowsTargetPlatformVersion Condition=" '$(WindowsTargetPlatformVersion)' == '' ">10.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformMinVersion Condition=" '$(WindowsTargetPlatformMinVersion)' == '' ">10.0.17763.0</WindowsTargetPlatformMinVersion>
+  </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <ItemGroup Label="ProjectConfigurations">
     <ProjectConfiguration Include="Debug|Win32">