Merge "Merge "Move LogBuffer and related to SystemUILogLib." into udc-dev am: 60e53b7a" into udc-dev-plus-aosp am: 23b1b0cb am: 61a3ecfa

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22480413



Change-Id: I4139a3de24cfdeb5d815c95981d9cecd9776c0f9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>