[API] Add new service to notify host from microdroid manager

This CL adds a new service to notify the host from
microdroid manager instead of the payload process.

Bug: 243512047
Test: MicrodroidTests microdroid_manager_test
Change-Id: Ic634944f6dd5266c084f495787bf4568a4d18ed3
diff --git a/microdroid_manager/aidl/Android.bp b/microdroid_manager/aidl/Android.bp
new file mode 100644
index 0000000..98ce6f5
--- /dev/null
+++ b/microdroid_manager/aidl/Android.bp
@@ -0,0 +1,17 @@
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+aidl_interface {
+    name: "android.system.virtualization.payload",
+    srcs: ["android/system/virtualization/payload/*.aidl"],
+    unstable: true,
+    backend: {
+        rust: {
+            enabled: true,
+            apex_available: [
+                "com.android.virt",
+            ],
+        },
+    },
+}
diff --git a/microdroid_manager/aidl/android/system/virtualization/payload/IVmPayloadService.aidl b/microdroid_manager/aidl/android/system/virtualization/payload/IVmPayloadService.aidl
new file mode 100644
index 0000000..4ae686b
--- /dev/null
+++ b/microdroid_manager/aidl/android/system/virtualization/payload/IVmPayloadService.aidl
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.system.virtualization.payload;
+
+/**
+ * This interface regroups the tasks that payloads delegate to
+ * Microdroid Manager for execution.
+ */
+interface IVmPayloadService {
+    /** Notifies that the payload is ready to serve. */
+    void notifyPayloadReady();
+}