Make open-dice rust wrapper compatible with upstream code

Bug: 357008987
Test: atest MicrodroidHostTests
Change-Id: Icc554f4a4d1fde77188d411dcf82a535c7b8ff6f
diff --git a/libs/dice/open_dice/Android.bp b/libs/dice/open_dice/Android.bp
index c60260e..3c5b6ea 100644
--- a/libs/dice/open_dice/Android.bp
+++ b/libs/dice/open_dice/Android.bp
@@ -132,6 +132,7 @@
         "--rustified-enum DiceConfigType",
         "--rustified-enum DiceMode",
         "--rustified-enum DiceResult",
+        "--rustified-enum DicePrincipal",
 
         // By generating only essential functions, we can make bindings concise and
         // optimize compilation time.