Add support for Android RIDs to NativeAOT (#117953)

* Enable building runtime packs for NativeAOT for Android RIDs

* Correctly handle android RIDs in the NativeAOT targets and use a linker flavor that fixes issues in the java toolchain (pulling from the dotnet/android targets)

* Update eng/Subsets.props

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Michal Strehovský <MichalStrehovsky@users.noreply.github.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Michal Strehovský <MichalStrehovsky@users.noreply.github.com>

Author: 3 people

eng/Subsets.props

@@ -47,7 +47,7 @@
     <MonoAOTCrossCompilerSupported Condition="'$(_MonoAotCrossSupportedOS)' == 'true' and '$(_MonoAotCrossSupportedArch)' == 'true'">true</MonoAOTCrossCompilerSupported>
 
     <!-- Determine if the NativeAOT runtime can run on the specified target. -->
-    <_NativeAotSupportedOS Condition="'$(TargetOS)' == 'windows' or '$(TargetOS)' == 'linux' or '$(TargetOS)' == 'osx' or '$(TargetOS)' == 'maccatalyst' or '$(TargetOS)' == 'iossimulator' or '$(TargetOS)' == 'ios' or '$(TargetOS)' == 'tvossimulator' or '$(TargetOS)' == 'tvos' or '$(TargetOS)' == 'freebsd'">true</_NativeAotSupportedOS>
+    <_NativeAotSupportedOS Condition="'$(TargetOS)' != 'browser' and '$(TargetOS)' != 'haiku' and '$(TargetOS)' != 'illumos' and '$(TargetOS)' != 'netbsd' and '$(TargetOS)' != 'solaris'">true</_NativeAotSupportedOS>
     <_NativeAotSupportedArch Condition="'$(TargetArchitecture)' == 'x64' or '$(TargetArchitecture)' == 'arm64' or '$(TargetArchitecture)' == 'arm' or '$(TargetArchitecture)' == 'loongarch64' or '$(TargetArchitecture)' == 'riscv64' or ('$(TargetOS)' == 'windows' and '$(TargetArchitecture)' == 'x86')">true</_NativeAotSupportedArch>
     <NativeAotSupported Condition="'$(_NativeAotSupportedOS)' == 'true' and '$(_NativeAotSupportedArch)' == 'true'">true</NativeAotSupported>
 
@@ -71,6 +71,7 @@
     <DefaultSubsets>clr+mono+libs+tools+host+packs</DefaultSubsets>
     <DefaultSubsets Condition="'$(TargetsMobile)' == 'true'">mono+libs+packs</DefaultSubsets>
     <DefaultSubsets Condition="'$(TargetsAndroid)' == 'true' and '$(CoreCLRSupported)' == 'true'">clr+mono+libs+host+packs</DefaultSubsets>
+    <DefaultSubsets Condition="'$(TargetsAndroid)' == 'true' and '$(CoreCLRSupported)' != 'true' and '$(NativeAotSupported)' == 'true'">clr.nativeaotruntime+clr.nativeaotlibs+mono+libs+packs</DefaultSubsets>
     <DefaultSubsets Condition="'$(TargetsAppleMobile)' == 'true'">clr.nativeaotruntime+clr.nativeaotlibs+mono+libs+packs</DefaultSubsets>
     <DefaultSubsets Condition="'$(TargetsLinuxBionic)' == 'true' and '$(MonoSupported)' == 'true'">clr.nativeaotruntime+clr.nativeaotlibs+mono+libs+host+packs</DefaultSubsets>
     <DefaultSubsets Condition="'$(TargetsLinuxBionic)' == 'true' and '$(MonoSupported)' != 'true'">clr.nativeaotruntime+clr.nativeaotlibs+libs+packs</DefaultSubsets>
@@ -153,7 +154,7 @@
     <BootstrapSubsets Condition="'$(UseNativeAotForComponents)' == 'true'">$(BootstrapSubsets)+clr.nativeaotlibs+clr.nativeaotruntime+libs.native</BootstrapSubsets>
 
     <SwapNativeForIL Condition="$(_subset.Contains('+bootstrap+')) and '$(RuntimeFlavor)' == 'CoreCLR'">true</SwapNativeForIL>
-    
+
     <!-- Define AllSubsets to include all available subsets including OnDemand ones -->
     <AllSubsetsExpansion>clr.nativeprereqs+clr.iltools+clr.runtime+clr.native+clr.aot+clr.nativeaotlibs+clr.nativeaotruntime+clr.crossarchtools</AllSubsetsExpansion>
     <AllSubsetsExpansion>$(AllSubsetsExpansion)+clr.paltests+clr.paltestlist+clr.hosts+clr.jit+clr.alljits+clr.alljitscommunity+clr.spmi+clr.corelib+clr.nativecorelib+clr.tools+clr.toolstests+clr.packages</AllSubsetsExpansion>

src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets

@@ -22,6 +22,7 @@ The .NET Foundation licenses this file to you under the MIT license.
     <_SymbolPrefix Condition="'$(_IsApplePlatform)' == 'true'">_</_SymbolPrefix>
     <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'freebsd'">lld</LinkerFlavor>
     <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_linuxLibcFlavor)' == 'bionic'">lld</LinkerFlavor>
+    <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'android'">lld</LinkerFlavor>
     <LinkerFlavor Condition="'$(LinkerFlavor)' == '' and '$(_targetOS)' == 'linux'">bfd</LinkerFlavor>
     <IlcDefaultStackSize Condition="'$(IlcDefaultStackSize)' == '' and '$(_linuxLibcFlavor)' == 'musl'">1572864</IlcDefaultStackSize>
   </PropertyGroup>
@@ -141,8 +142,9 @@ The .NET Foundation licenses this file to you under the MIT license.
       <NetCoreAppNativeLibrary Include="System.IO.Compression.Native" />
       <NetCoreAppNativeLibrary Include="System.Net.Security.Native" Condition="!$(_targetOS.StartsWith('tvos')) and '$(_linuxLibcFlavor)' != 'bionic'" />
       <NetCoreAppNativeLibrary Include="System.Security.Cryptography.Native.Apple" Condition="'$(_IsApplePlatform)' == 'true'" />
-      <!-- Not compliant for Apple platforms -->
-      <NetCoreAppNativeLibrary Include="System.Security.Cryptography.Native.OpenSsl" Condition="'$(StaticOpenSslLinking)' != 'true' and '$(_IsApplePlatform)' != 'true'" />
+      <!-- No OpenSSL on Apple platforms or Android -->
+      <NetCoreAppNativeLibrary Include="System.Security.Cryptography.Native.OpenSsl" Condition="'$(StaticOpenSslLinking)' != 'true' and '$(_IsApplePlatform)' != 'true' and '$(_targetOS)' != 'android'" />
+      <NetCoreAppNativeLibrary Include="System.Security.Cryptography.Native.Android" Condition="'$(_targetOS)' == 'android'" />
     </ItemGroup>
 
     <ItemGroup>

src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.targets

@@ -234,7 +234,9 @@ The .NET Foundation licenses this file to you under the MIT license.
       <IlcArg Include="@(IlcSatelliteAssembly->'--satellite:%(Identity)')" />
       <IlcArg Include="@(MibcFile->'--mibc:%(Identity)')" />
       <IlcArg Condition="$(IlcGenerateMetadataLog) == 'true'" Include="--metadatalog:$(NativeIntermediateOutputPath)%(ManagedBinary.Filename).metadata.csv" />
-      <IlcArg Condition="$(_targetOS) != ''" Include="--targetos:$(_targetOS)" />
+      <!-- To the NativeAOT compiler, Android is just another linux -->
+      <IlcArg Condition="'$(_targetOS)' == 'android'" Include="--targetos:linux" />
+      <IlcArg Condition="'$(_targetOS)' != '' and '$(_targetOS)' != 'android'" Include="--targetos:$(_targetOS)" />
       <IlcArg Condition="$(_targetArchitectureWithAbi) != ''" Include="--targetarch:$(_targetArchitectureWithAbi)" />
       <IlcArg Condition="$(IlcMultiModule) == 'true'" Include="--multifile" />
       <IlcArg Condition="$(IlcMultiModule) != 'true' and '$(IlcDehydrate)' != 'false' and ($(_targetOS) != 'win' or '$(OptimizationPreference)' == 'Size' or '$(IlcDehydrate)' == 'true')" Include="--dehydrate" />