[pvmfw] Use hkdf from libbssl instead of bssl bindgen

With this cl, the size of pvmfw.bin increases from
497792 bytes to 497952 bytes.

Test: m pvmfw_bin
Bug: 301068421
Change-Id: Ia5149d2609a33013bee0aa8856f460d07de27ed4
diff --git a/pvmfw/Android.bp b/pvmfw/Android.bp
index 523334f..8c21030 100644
--- a/pvmfw/Android.bp
+++ b/pvmfw/Android.bp
@@ -12,6 +12,7 @@
     ],
     rustlibs: [
         "libaarch64_paging",
+        "libbssl_avf_nostd",
         "libbssl_ffi_nostd",
         "libciborium_nostd",
         "libciborium_io_nostd",