[bssl] Add HKDF wrapper to libbssl

Test: atest libbssl_avf_nostd.test
Bug: 301068421
Change-Id: Iffe99f3cb609215680b7d44bde8ae0ee5c502171
diff --git a/libs/bssl/tests/tests.rs b/libs/bssl/tests/tests.rs
index dc73c1e..1077787 100644
--- a/libs/bssl/tests/tests.rs
+++ b/libs/bssl/tests/tests.rs
@@ -14,4 +14,5 @@
 
 //! API tests of the crate `bssl_avf`.
 
+mod hkdf_test;
 mod hmac_test;