Remove _init and _fini exports from NAOT and update android docs (#100755)

Author: am11

src/coreclr/nativeaot/docs/android-bionic.md

@@ -29,12 +29,11 @@ For an example of a Native AOT shared library invoked through JNI from Java see
 
 ## Known issues
 
-If you hit `error : version script assignment of 'V1.0' to symbol '_init' failed: symbol not defined` - this is a known issue https://github.com/dotnet/runtime/issues/92272, you can add following lines to your csproj to work around:
+If you hit `error : version script assignment of 'V1.0' to symbol '_init' failed: symbol not defined` - this is a known issue with .NET 8 release https://github.com/dotnet/runtime/issues/92272, you can add following lines to your csproj to work around:
 
 ```xml
-<ItemGroup Condition="'$(RuntimeIdentifier)' == 'linux-bionic'">
-  <LinkerArg Include="-Wl,--defsym,_init=__libc_init" />
-  <LinkerArg Include="-Wl,--defsym,_fini=__libc_fini" />
+<ItemGroup Condition="$(RuntimeIdentifier.StartsWith('linux-bionic'))">
+  <LinkerArg Include="-Wl,--undefined-version" />
 </ItemGroup>
 ```
 

src/coreclr/tools/aot/ILCompiler.Compiler/Compiler/ExportsFileWriter.cs

@@ -51,7 +51,7 @@ public void EmitExportedMethods()
                 else
                 {
                     streamWriter.WriteLine("V1.0 {");
-                    streamWriter.WriteLine("    global: _init; _fini;");
+                    streamWriter.WriteLine("    global:");
                     foreach (string symbol in _exportSymbols)
                         streamWriter.WriteLine($"        {symbol};");
                     foreach (var method in _methods)