Merge "Log plug state chage & other events at boot" into udc-dev am:...

Merge "Log plug state chage & other events at boot" into udc-dev am: 9ada0c5a am: 37c4486e am: ff615055

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23854042



Change-Id: Ia2a1a9cadcb47a6c3b56026917b957b33348cda7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>