Diced: Add vendor library for DICE HAL implementations.

Bug: 198197213
Test: atest diced_vendor_test
Change-Id: If2bca4584206dc26a49ffd2fea71d7192d2678bf
diff --git a/diced/open_dice_cbor/Android.bp b/diced/open_dice_cbor/Android.bp
index 0d05ce0..a92c712 100644
--- a/diced/open_dice_cbor/Android.bp
+++ b/diced/open_dice_cbor/Android.bp
@@ -32,4 +32,5 @@
         "libopen_dice_bcc",
         "libopen_dice_cbor",
     ],
+    vendor_available: true,
 }