Merge "[Bouncer] Add bouncer log buffer." into tm-qpr-dev am: 1cd9826aa0 am: 3626471c89

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20667290

Change-Id: Ia56995f8b81aaf03cb0e27fb2e6efdd999f0abe7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>