Add UpdateAttempterIntegrationTesting

Test: th
Bug: 201099341

Change-Id: I46d5ad86e238d28b7c20ef6768ffadf0e6ab9177
diff --git a/payload_consumer/filesystem_verifier_action.cc b/payload_consumer/filesystem_verifier_action.cc
index 8b39f6d..0da3fba 100644
--- a/payload_consumer/filesystem_verifier_action.cc
+++ b/payload_consumer/filesystem_verifier_action.cc
@@ -434,7 +434,7 @@
   InstallPlan::Partition& partition =
       install_plan_.partitions[partition_index_];
   LOG(INFO) << "Hash of " << partition.name << ": "
-            << Base64Encode(hasher_->raw_hash());
+            << HexEncode(hasher_->raw_hash());
 
   switch (verifier_step_) {
     case VerifierStep::kVerifyTargetHash: