[attestation] Build the BoringSSL EcKey from the COSE public key

Bug: 309440321
Test: atest rialto_test
Change-Id: I674d8edf2d806e7455b836b7a50a776ac75bc800
diff --git a/libs/bssl/Android.bp b/libs/bssl/Android.bp
index 0a2f334..ff45af9 100644
--- a/libs/bssl/Android.bp
+++ b/libs/bssl/Android.bp
@@ -23,6 +23,7 @@
     rustlibs: [
         "libbssl_avf_error_nostd",
         "libbssl_ffi_nostd",
+        "libciborium_nostd",
         "libcoset_nostd",
         "liblog_rust_nostd",
         "libzeroize_nostd",
@@ -44,5 +45,6 @@
     defaults: ["libbssl_avf_test_defaults"],
     rustlibs: [
         "libbssl_avf_nostd",
+        "libcoset_nostd",
     ],
 }