[rkp] Generate EC P-256 key pair for the RKP HAL

This cl generates the EC P-256 key pair needed by the RKP HAL.
The MAC of the public key and wrapping of the private key will be
handled in subsequent cls.

Bug: 299055662
Test: atest rialto_test
Change-Id: I253130e62bbf70cb5a7abe1a056fc4f77d30aa6e
diff --git a/rialto/Android.bp b/rialto/Android.bp
index 05775c2..cb3e477 100644
--- a/rialto/Android.bp
+++ b/rialto/Android.bp
@@ -9,6 +9,7 @@
     defaults: ["vmbase_ffi_defaults"],
     rustlibs: [
         "libaarch64_paging",
+        "libbssl_ffi_nostd",
         "libciborium_io_nostd",
         "libciborium_nostd",
         "libdiced_open_dice_nostd",
@@ -21,6 +22,10 @@
         "libtinyvec_nostd",
         "libvirtio_drivers",
         "libvmbase",
+        "libzeroize_nostd",
+    ],
+    static_libs: [
+        "libcrypto_baremetal",
     ],
 }