Merge "Reset buffer after stop protolog to file" am: 18493d62 am: 140fb234 am: 83bb3e26 am: 5d520cb0 am: 90a90192

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2411151



Change-Id: I0e75ef70ac9c166676af8ea99126ea0174b79563
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>