[dice] Add BccHandoverMainFlow wrapper to diced_open_dice

As a step of merging the existing diced_open_dice_cbor library into
the new open-dice wrapper diced_open_dice.

This API will be used in pvmfw later.

Bug: 267575445
Test: atest diced_utils_test diced_sample_inputs_test \
diced_vendor_test diced_open_dice_cbor_test \
libdiced_open_dice_nostd.integration_test \
libdiced_open_dice.integration_test diced_open_dice_cbor_test

Change-Id: I7f2525bfa8452e0ad98cfcea6f83657a164dcb6b
diff --git a/diced/open_dice/src/lib.rs b/diced/open_dice/src/lib.rs
index 7e8c59a..83de5db 100644
--- a/diced/open_dice/src/lib.rs
+++ b/diced/open_dice/src/lib.rs
@@ -27,7 +27,7 @@
 #[cfg(feature = "std")]
 mod retry;
 
-pub use bcc::{bcc_format_config_descriptor, bcc_main_flow};
+pub use bcc::{bcc_format_config_descriptor, bcc_handover_main_flow, bcc_main_flow};
 pub use dice::{
     derive_cdi_certificate_id, derive_cdi_private_key_seed, dice_main_flow, Cdi, CdiValues, Config,
     DiceMode, Hash, Hidden, InlineConfig, InputValues, PrivateKeySeed, CDI_SIZE, HASH_SIZE,