Revert "Change apex_available value of libavf based on avf_enabled"

Revert submission 3477737-move_apex_shortcut

Reason for revert: Likely culprit for b/394990888 - verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.

Reverted changes: /q/submissionid:3477737-move_apex_shortcut

Change-Id: I11a70fe1bd4d079eb5b62e4c0a3c0098e5f84648
diff --git a/guest/authfs/Android.bp b/guest/authfs/Android.bp
index 28e0f4a..d7a8322 100644
--- a/guest/authfs/Android.bp
+++ b/guest/authfs/Android.bp
@@ -47,8 +47,5 @@
 rust_binary {
     name: "authfs",
     defaults: ["authfs_defaults"],
-    // //apex_available:platform is necessary here to counteract the
-    // com.android.virt in crosvm_defaults and make authfs available
-    // to the platform so it can be embedded in the microdroid image.
-    apex_available: ["//apex_available:platform"],
+    apex_available: ["com.android.virt"],
 }