update_engine: Dump InstallPlan with Partitions

Improve visibity to see |InstallPlan| after which the
|InstallPlan::Partition|s are populated by |DeltaPerformer|.

BUG=chromium:928805
TEST=FEATURES=test emerge-$B update_engine update_engine-client
TEST=# logs on DUT for dump

Change-Id: I3f53cca7bd006a2d4d01ad738850ebb954cbd73f
Reviewed-on: https://chromium-review.googlesource.com/c/aosp/platform/system/update_engine/+/2163175
Tested-by: Jae Hoon Kim <kimjae@chromium.org>
Reviewed-by: Andrew Lassalle <andrewlassalle@chromium.org>
Reviewed-by: Amin Hassani <ahassani@chromium.org>
Commit-Queue: Amin Hassani <ahassani@chromium.org>
diff --git a/payload_consumer/filesystem_verifier_action.cc b/payload_consumer/filesystem_verifier_action.cc
index 36e5a35..f9e7f81 100644
--- a/payload_consumer/filesystem_verifier_action.cc
+++ b/payload_consumer/filesystem_verifier_action.cc
@@ -57,6 +57,7 @@
     abort_action_completer.set_code(ErrorCode::kSuccess);
     return;
   }
+  install_plan_.Dump();
 
   StartPartitionHashing();
   abort_action_completer.set_should_complete(false);