Add early_vms xsd schema

Each partition will have a xml config file listing all early VMs (name,
cid, client tuples).

Bug: 354059549
Test: build
Change-Id: I141af0bc12492be8c2640830a247305dfe8064ec
diff --git a/android/virtmgr/Android.bp b/android/virtmgr/Android.bp
index 62ff8d8..cbb7b38 100644
--- a/android/virtmgr/Android.bp
+++ b/android/virtmgr/Android.bp
@@ -95,6 +95,13 @@
     apex_available: ["com.android.virt"],
 }
 
+xsd_config {
+    name: "early_vms",
+    srcs: ["early_vms.xsd"],
+    api_dir: "schema",
+    package_name: "android.system.virtualizationservice",
+}
+
 rust_test {
     name: "virtualizationmanager_device_test",
     srcs: ["src/main.rs"],