Merge "Add two more logging helper classes. One for SaveEventReported and one...

Merge "Add two more logging helper classes. One for SaveEventReported and one for SessionCommitted. They will be used in the follow-up cr." into udc-dev am: 19fa3e20 am: e18666b1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22324579



Change-Id: I253f4557690562ef2e8f1e455f33dfacec8104ce
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>