Add debug logs to understand slow update start issue am: e70fa767ae

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/3183139

Change-Id: I1819db97870a0502072d99d78025c7e84b778b00
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/aosp/update_attempter_android.cc b/aosp/update_attempter_android.cc
index 0f6fc5c..b19d424 100644
--- a/aosp/update_attempter_android.cc
+++ b/aosp/update_attempter_android.cc
@@ -299,6 +299,8 @@
   install_plan_.is_resume = !payload_id.empty() &&
                             DeltaPerformer::CanResumeUpdate(prefs_, payload_id);
   if (!install_plan_.is_resume) {
+    LOG(INFO) << "Starting a new update " << payload_url
+              << " size: " << payload_size << " offset: " << payload_offset;
     boot_control_->GetDynamicPartitionControl()->Cleanup();
     boot_control_->GetDynamicPartitionControl()->ResetUpdate(prefs_);