Let's see...

Author: grendello

src/Xamarin.Android.Build.Tasks/Microsoft.Android.Sdk/targets/Microsoft.Android.Sdk.AssemblyResolution.targets

@@ -185,7 +185,7 @@ _ResolveAssemblies MSBuild target.
 
   <Target Name="_PrepareAssemblies"
       DependsOnTargets="$(_PrepareAssembliesDependsOnTargets)">
-    <ItemGroup Condition=" '$(PublishTrimmed)' != 'true' ">
+    <ItemGroup Condition=" '$(PublishTrimmed)' != 'true' or '$(AndroidIncludeDebugSymbols)' == 'true' ">
       <_ResolvedAssemblies          Include="@(ResolvedAssemblies->'$(MonoAndroidIntermediateAssemblyDir)%(DestinationSubPath)')"          Condition=" '%(DestinationSubPath)' != '' " />
       <_ResolvedUserAssemblies      Include="@(ResolvedUserAssemblies->'$(MonoAndroidIntermediateAssemblyDir)%(DestinationSubPath)')"      Condition=" '%(DestinationSubPath)' != '' " />
       <_ResolvedFrameworkAssemblies Include="@(ResolvedFrameworkAssemblies->'$(MonoAndroidIntermediateAssemblyDir)%(DestinationSubPath)')" Condition=" '%(DestinationSubPath)' != '' " />
@@ -194,7 +194,7 @@ _ResolveAssemblies MSBuild target.
       <_ShrunkUserAssemblies        Include="@(_ResolvedUserAssemblies)" />
       <_ShrunkFrameworkAssemblies   Include="@(_ResolvedFrameworkAssemblies)" />
     </ItemGroup>
-    <ItemGroup Condition=" '$(PublishTrimmed)' == 'true' ">
+    <ItemGroup Condition=" '$(PublishTrimmed)' == 'true' and '$(AndroidIncludeDebugSymbols)' != 'true' ">
       <_ResolvedAssemblies          Include="@(ResolvedAssemblies)" />
       <_ResolvedUserAssemblies      Include="@(ResolvedUserAssemblies)" />
       <_ResolvedFrameworkAssemblies Include="@(ResolvedFrameworkAssemblies)" />

src/Xamarin.Android.Build.Tasks/Microsoft.Android.Sdk/targets/Microsoft.Android.Sdk.AssemblyStores.targets

@@ -8,13 +8,18 @@
       BuildTargetAbis="@(_BuildTargetAbis)"
       NativeSourcesDir="$(_NativeAssemblySourceDir)"
       Mode="EmbeddedAssemblyStore">
-    <Output TaskParameter="AssemblySources" ItemName="_EmbeddedAssemblyStoreSourceFiles" />
-  </PrepareAbiItems>
+      <Output TaskParameter="AssemblySources" ItemName="_EmbeddedAssemblyStoreSourceFiles" />
+    </PrepareAbiItems>
+
+    <ItemGroup>
+      <_CreateEmbeddedAssemblyStoreAssembly Include="@(_ShrunkUserAssemblies);@(_AndroidResolvedSatellitePaths);@(_ShrunkFrameworkAssemblies)"/>
+      <_CreateEmbeddedAssemblyStoreAssembly Condition=" '@(_CreateEmbeddedAssemblyStoreAssembly->Count())' == '0' " Include="@(_ResolvedUserAssemblies);@(_ResolvedFrameworkAssemblies);@(_AndroidResolvedSatellitePaths)" />
+    </ItemGroup>
   </Target>
 
   <Target Name="_CreateEmbeddedAssemblyStore"
           DependsOnTargets="_PrepareCreateEmbeddedAssemblyStoreOutputItems"
-          Inputs="@(_ShrunkUserAssemblies);@(_AndroidResolvedSatellitePaths);@(_ShrunkFrameworkAssemblies)"
+          Inputs="@(_CreateEmbeddedAssemblyStoreAssembly)"
           Outputs="@(_EmbeddedAssemblyStoreSourceFiles)">
     <CreateEmbeddedAssemblyStore
         AndroidBinUtilsDirectory="$(AndroidBinUtilsDirectory)"