[illink] Set default for `$(UseSizeOptimizedLinq) (#9718)

Context: dotnet/sdk#46375

Sets the default for switch added in dotnet/sdk#46375.

(Should merge before we start consuming the SDK/runtime that has this.)

Author: MichalStrehovsky

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

@@ -117,6 +117,7 @@
     <HttpActivityPropagationSupport Condition="'$(HttpActivityPropagationSupport)' == ''">false</HttpActivityPropagationSupport>
     <InvariantGlobalization Condition="'$(InvariantGlobalization)' == ''">false</InvariantGlobalization>
     <StartupHookSupport Condition="'$(StartupHookSupport)' == ''">false</StartupHookSupport>
+    <UseSizeOptimizedLinq Condition="'$(UseSizeOptimizedLinq)' == ''">true</UseSizeOptimizedLinq>
     <UseNativeHttpHandler Condition=" $(AndroidHttpClientHandlerType.Contains ('System.Net.Http.SocketsHttpHandler')) And '$(UseNativeHttpHandler)' == '' ">false</UseNativeHttpHandler>
     <UseNativeHttpHandler Condition="'$(UseNativeHttpHandler)' == ''">true</UseNativeHttpHandler>
     <BuiltInComInteropSupport Condition="'$(BuiltInComInteropSupport)' == ''">false</BuiltInComInteropSupport>