[test] Add API test target for libbssl

And checks the function hmac_sha256.

Bug: 301068421
Test: atest libbssl_avf_nostd.test
Change-Id: I3b4ebc9d9bd473b79103038181e2310a523f29a6
diff --git a/TEST_MAPPING b/TEST_MAPPING
index 171389b..adf6309 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -72,6 +72,9 @@
       "path": "packages/modules/Virtualization/libs/avb"
     },
     {
+      "path": "packages/modules/Virtualization/libs/bssl"
+    },
+    {
       "path": "packages/modules/Virtualization/libs/capabilities"
     },
     {