[avb] Refactor Payload and AvbOps into new module ops

Bug: 256148034
Test: m pvmfw_img && atest libpvmfw_avb.integration_test
Change-Id: I001be824245dd1ea01ee01868ed4dbbfb37b86c6
diff --git a/pvmfw/avb/src/lib.rs b/pvmfw/avb/src/lib.rs
index f0ee4ed..a1e3ee0 100644
--- a/pvmfw/avb/src/lib.rs
+++ b/pvmfw/avb/src/lib.rs
@@ -19,6 +19,7 @@
 #![feature(mixed_integer_ops)]
 
 mod error;
+mod ops;
 mod partition;
 mod utils;
 mod verify;