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/apex/Android.bp b/apex/Android.bp
index c875131..ccf34fd 100644
--- a/apex/Android.bp
+++ b/apex/Android.bp
@@ -52,6 +52,9 @@
     java_libs: [
         "android.system.virtualmachine",
     ],
+    apps: [
+        "android.system.virtualmachine.res",
+    ],
     prebuilts: [
         "com.android.virt.init.rc",
         "microdroid.json",