Allow virt APEX to use diced and open_dice_cbor

Microdroid payloads use diced to access their secrets and BCCs. The
open_dice_cbor then gives them safe rust bindings to open-dice to
process them. There's a dependency on ZVec which pulls in
libkeystore2_crypto.

Test: build, TH
Change-Id: I402a9a416d7b0e0eed2e268495b148e5669e5c52
diff --git a/diced/open_dice_cbor/Android.bp b/diced/open_dice_cbor/Android.bp
index 3e67045..a84190a 100644
--- a/diced/open_dice_cbor/Android.bp
+++ b/diced/open_dice_cbor/Android.bp
@@ -33,6 +33,10 @@
         "libopen_dice_cbor",
     ],
     vendor_available: true,
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.virt",
+    ],
 }
 
 rust_test {