Update to zerocopy 0.8.

Bug: 372549215
Test: m vfio_handler pvmfw virtmgr apkdmverity libdm_rust.test
Change-Id: I81f6aea8bf984c0506c6f6b0754b6addc59fc3ca

diff --git a/libs/libvmbase/src/rand.rs b/libs/libvmbase/src/rand.rs
index b31bd4b..16c7b6a 100644
--- a/libs/libvmbase/src/rand.rs
+++ b/libs/libvmbase/src/rand.rs
@@ -18,7 +18,7 @@
 use core::fmt;
 use core::mem::size_of;
 use smccc::{self, Hvc};
-use zerocopy::AsBytes as _;
+use zerocopy::IntoBytes as _;
 
 type Entropy = [u8; size_of::<u64>() * 3];