[bssl] Implement AEAD BoringSSL wrapper

AEAD will be used to encrypt the private key in the RKP HAL.

Bug: 302286887
Test: atest libbssl_avf_nostd.test
Change-Id: I734cf5ecd8b938f2c47f439d6f51594ccafb4ff2
diff --git a/libs/bssl/tests/tests.rs b/libs/bssl/tests/tests.rs
index 1077787..4c0b0b0 100644
--- a/libs/bssl/tests/tests.rs
+++ b/libs/bssl/tests/tests.rs
@@ -14,5 +14,6 @@
 
 //! API tests of the crate `bssl_avf`.
 
+mod aead_test;
 mod hkdf_test;
 mod hmac_test;