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: Ic5ec62a33d9447f71e16de45a4c5ba5cb4a39b0e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>