Build with Visual Studio 2022 (#1793)

- Use Visual Studio 2022
- Use an Azure Pipelines image which has Visual Studio 2022 installed
- Use the v143 C++ build tools
- Use the Windows SDK version 22000
- Raise the minimum platform version to 17763
  - As a consequence of this change, we will use the "msix" file extension instead of "appx" for our packages
- Update UI tests from .NET Core 2.1 to .NET Core 3.1

src/CalculatorUITestFramework/CalculatorUITestFramework.csproj

@@ -3,7 +3,7 @@
     <TargetFramework>netstandard2.0</TargetFramework>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Appium.WebDriver" Version="4.0.0.6-beta" />
-    <PackageReference Include="MSTest.TestFramework" Version="1.4.0" />
+    <PackageReference Include="Appium.WebDriver" Version="4.3.1" />
+    <PackageReference Include="MSTest.TestFramework" Version="2.2.8" />
   </ItemGroup>
 </Project>

src/CalculatorUITestFramework/WinAppDriver.cs

@@ -56,9 +56,9 @@ namespace CalculatorUITestFramework
                 // Note: Multiple calculator windows (instances) share the same process Id
                 var options = new AppiumOptions();
 
-                if (context.Properties.TryGetValue("AppId", out object appId))
+                if (context.Properties.Contains("AppId"))
                 {
-                    options.AddAdditionalCapability("app", (string)appId);
+                    options.AddAdditionalCapability("app", (string)context.Properties["AppId"]);
                 }
                 else
                 {