Add com.android.virt

com.android.virt is an APEX for virtual machine monitors like crosvm.
The APEX currently empty and isn't updatable.

Bug: 174633082
Test: m com.android.virt

Change-Id: I8acc8e147aadb1701dc65f6950b61701131f89d2
diff --git a/apex/Android.bp b/apex/Android.bp
index 53303c6..8c25259 100644
--- a/apex/Android.bp
+++ b/apex/Android.bp
@@ -175,6 +175,13 @@
 }
 
 filegroup {
+  name: "com.android.virt-file_contexts",
+  srcs: [
+    "com.android.virt-file_contexts",
+  ],
+}
+
+filegroup {
   name: "com.android.vndk-file_contexts",
   srcs: [
     "com.android.vndk-file_contexts",