Build service-virtualization directly against framework

This allow usage of the hidden APIs exposed by Android framework. It is
ok for us to do so, because com.android.virt is a non-updatable APEX.

Bug: 325196727
Test: builds
Change-Id: I294c9902dc443e8b4df629004a9818c3d9554bac
diff --git a/java/service/Android.bp b/java/service/Android.bp
index 9c1fa01..fdfb203 100644
--- a/java/service/Android.bp
+++ b/java/service/Android.bp
@@ -23,8 +23,13 @@
     ],
     defaults: [
         "framework-system-server-module-defaults",
+        "platform_service_defaults",
     ],
-    sdk_version: "system_server_current",
+    libs: [
+        "framework",
+        "services.core",
+    ],
+    sdk_version: "core_platform",
     apex_available: ["com.android.virt"],
     installable: true,
 }