Access control for virtualizationservice

The access to the virtualizationservice is now controlled via Android
permissions:

* android.permission.MANAGE_VIRTUAL_MACHINE
* android.permission.DEBUG_VIRTUAL_MACHINE

The two permissions are defined in a resource-only APK
android.system.virtualmachine.res. Virtualizationservice is modified to
do the permission check by using the permission controller service.

Bug: 168588769
Test: /apex/com.android.virt/bin/vm run-app --log /dev/null
/data/local/tmp/virt/MicrodroidDemoApp.apk
/data/local/tmp/virt/MicrodroidDemoApp.apk.idsig assets/vm_config.json

Change-Id: Id210d2a55bc57bf03200c3c8546e3c63aa2a4c52
diff --git a/javalib/Android.bp b/javalib/Android.bp
index f920175..26ad848 100644
--- a/javalib/Android.bp
+++ b/javalib/Android.bp
@@ -20,3 +20,10 @@
     // TODO(jiyong): remove the below once this gets public
     unsafe_ignore_missing_latest_api: true,
 }
+
+android_app {
+    name: "android.system.virtualmachine.res",
+    installable: true,
+    apex_available: ["com.android.virt"],
+    sdk_version: "current",
+}