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

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



Change-Id: I410ab1cb5f83a07ba60df3e970a0dc6e9471740e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>