chore: Build winappsdk using unpackaged mode

Author: jeromelaban

build/stage-build-samples.yml

@@ -77,7 +77,7 @@ jobs:
       # NOTE: Currently, the CI just validates that the sample builds, and we don't publish actual apps.
       # In future, if we publish actual apps, it could happen that AndroidAddKeepAlives=false may cause issues.
       # So it will be safer to remove it. For now, we set it to false as it makes the build much faster.
-      dotnet build $(solutionPath) /p:AndroidAddKeepAlives=false /p:Configuration=Release /p:WasmShellMonoRuntimeExecutionMode=Interpreter /p:PublishTrimmed=false /p:WasmShellILLinkerEnabled=false /p:EnableCoreMrtTooling=false /p:RunAOTCompilation=false /p:MtouchUseLlvm=false "/bl:$(build.artifactstagingdirectory)\$(Agent.JobName).binlog"
+      dotnet build $(solutionPath) /p:AndroidAddKeepAlives=false /p:Configuration=Release /p:WasmShellMonoRuntimeExecutionMode=Interpreter /p:PublishTrimmed=false /p:WasmShellILLinkerEnabled=false /p:EnableCoreMrtTooling=false /p:RunAOTCompilation=false /p:MtouchUseLlvm=false /p:WindowsAppSDKSelfContained=false /p:WindowsPackageType=None "/bl:$(build.artifactstagingdirectory)\$(Agent.JobName).binlog"
 
       # Locate test projects and execute tests if applicable.
       $folderPath = [System.IO.Path]::GetDirectoryName("$(solutionPath)")