[rkp] Build MACed public key from boringssl EC_KEY

The secret will be added in a subsequent after we get the DICE
chain info of the RKP VM.

Bug: 300068317
Test: atest rialto_test
Change-Id: Ia373930fc8f1c6d38349208ca62b9b71b98d126f
diff --git a/rialto/src/requests/mod.rs b/rialto/src/requests/mod.rs
index d70791f..8162237 100644
--- a/rialto/src/requests/mod.rs
+++ b/rialto/src/requests/mod.rs
@@ -16,6 +16,7 @@
 
 mod api;
 mod ec_key;
+mod pub_key;
 mod rkp;
 
 pub use api::process_request;