Fix slow Android debug startup caused by unbundled assembly lookups

[Copilot]

On debug builds, the .NET Android runtime attempts to load each assembly from the APK bundle first, fails (Fast Deployment places them outside the APK), then falls back to the deployed location. With 100+ assemblies, this double-lookup adds 20+ seconds to startup and can trigger ANR warnings on the emulator.

Change

• Added EmbedAssembliesIntoApk=true to the Debug Android PropertyGroup in TransactionProcessor.Mobile.csproj, embedding assemblies directly in the APK and eliminating the failed-lookup fallback entirely.

<PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Debug|net10.0-android|AnyCPU'">
  <EmbedAssembliesIntoApk>true</EmbedAssembliesIntoApk>
</PropertyGroup>

Release builds are unaffected.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Slow Application Startup</issue_title>
<issue_description>App takes a long time to load when debugging. Somtimes the emulator thinks the app has hung.

Looking at the logs there are a lot of error loading bundled assemblies, can this be investigated please.

Here are the errors I captured:

03-05 11:24:38.355 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly TransactionProcessor.Mobile.dll
03-05 11:24:38.356 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly Mono.Android.dll
03-05 11:24:38.363 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly System.Runtime.dll
03-05 11:24:38.367 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly Java.Interop.dll
03-05 11:24:38.375 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly System.Runtime.InteropServices.dll
03-05 11:24:39.210 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly Mono.Android.Runtime.dll
03-05 11:24:39.240 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly System.Collections.dll
03-05 11:24:39.240 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly System.Collections.Concurrent.dll
03-05 11:24:39.241 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly System.Threading.dll
03-05 11:24:40.637 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly System.Threading.Thread.dll
03-05 11:24:40.642 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly System.Diagnostics.StackTrace.dll
03-05 11:24:41.015 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly Microsoft.Maui.dll
03-05 11:24:41.222 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly System.Memory.dll
03-05 11:24:42.532 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly Microsoft.Maui.Essentials.dll
03-05 11:24:42.534 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly Xamarin.AndroidX.Core.dll
03-05 11:24:43.026 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly System.Console.dll
03-05 11:24:43.477 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly System.ComponentModel.dll
03-05 11:24:43.711 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly Microsoft.VisualStudio.DesignTools.MobileTapContracts.dll
03-05 11:24:43.844 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly netstandard.dll
03-05 11:24:44.780 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly Microsoft.VisualStudio.DesignTools.TapContract.dll
03-05 11:24:45.069 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly Microsoft.Extensions.DependencyInjection.Abstractions.dll
03-05 11:24:45.591 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly Microsoft.Extensions.Hosting.Abstractions.dll
03-05 11:24:45.592 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly Microsoft.Maui.Controls.dll
03-05 11:24:45.598 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly System.ObjectModel.dll
03-05 11:24:45.634 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly Microsoft.Maui.Controls.Xaml.dll
03-05 11:24:45.989 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly CommunityToolkit.Maui.dll
03-05 11:24:46.124 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly CommunityToolkit.Maui.Core.dll
03-05 11:24:46.177 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly Microsoft.Extensions.Configuration.dll
03-05 11:24:46.363 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly Microsoft.Extensions.Configuration.Abstractions.dll
03-05 11:24:46.389 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly Microsoft.Extensions.Diagnostics.Abstractions.dll
03-05 11:24:46.397 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly Microsoft.Extensions.Logging.Abstractions.dll
03-05 11:24:46.680 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly TransactionProcessor.Mobile.BusinessLogic.dll
03-05 11:24:46.809 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly Microsoft.Extensions.Caching.Memory.dll
03-05 11:24:46.812 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly Microsoft.Extensions.Logging.dll
03-05 11:24:47.187 W/monodroid-assembly(20967): open_from_bundles: failed to load bundled assembly Microsoft.Extensions.Primitives.dll
03-05 11:24:47.351 ...

• Fixes Slow Application Startup #471

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